Blood vessels defined. any of the tubes through which blood flows in the body 2.
Blood vessels defined. Together, these three components—blood, heart, and vessels—make up the cardiovascular system. An artery (AR-tĕr-ē) is a blood vessel that carries blood away from the heart. See examples of BLOOD VESSEL used in a sentence. Vasodilation The increase in the internal diameter of a blood vessel that results from relaxation of smooth muscle within the wall of the vessel thus causing an increase in blood flow. A hyphema, though, is usually painful. Veins are part of your circulatory system. The vessels that carry blood away from the heart are called arteries. In CAD, there is reduced blood flow to the heart muscle. BLOOD VESSEL definition: 1. n. Learn more. These are tube-like structures that along with the heart form the cardiovascular system. What does blood-vessel mean? What is cerebrovascular disease? Cerebrovascular disease is an umbrella term for conditions that impact the blood vessels in your brain. Jul 27, 2022 · What is collateral circulation? Collateral circulation is alternate or “backup” blood vessels in your body that can take over when another artery or vein becomes blocked or damaged. Learn more about the anatomy and types of blood vessels and the diseases that affect them. Sep 25, 2025 · Overview Hypertension (high blood pressure) is when the pressure in your blood vessels is too high (140/90 mmHg or higher). How do you know if a blood vessel is an artery, vein, or capillary? Blood vessels are the part of the cardiovascular system that transports blood throughout the human body. [2] Blood vessel walls are composed of endothelial tissue and a basal membrane lining the lumen of the vessel A tube through which the blood circulates in the body. Have you ever imagined what would happen if the blood vessels stopped functioning for a few seconds? Yes, we would die from SCA – Sudden Cardiac Arrest. Veins Veins are defined as blood vessels that carry blood toward the heart. Arteriosclerosis and atherosclerosis are sometimes used to mean the same thing. All arteries carry oxygenated blood–except for the pulmonary artery. . This buildup narrows the arteries, making it harder for blood to flow through. A broken blood vessel in the eye is a common, harmless condition called subconjunctival hemorrhage. Learn what causes it, what the symptoms are, and how you can prevent it. Blood vessel facts for kidsA blood vessel is like a tiny tube that carries blood all around your body. Jun 14, 2024 · It affects the main blood vessels that supply blood to the heart, called the coronary arteries. Capillaries come together to form venules, small blood vessels that carry blood to a Blood vessel definition: any of the vessels, as arteries, veins, or capillaries, through which the blood circulates. Blood is propelled by the heart, with arteries, capillaries, and veins serving as the major vessels of the system. vasodilation (right) Vasodilation, also known as vasorelaxation, is the widening of blood vessels. American Heritage® Dictionary of the English Jul 24, 2025 · Ischemia is a serious problem where some part of your body, like your heart or brain, isn’t getting enough blood. There are three major types of blood vessels: (1) arteries, (2) veins, and (3) capillaries. Blood traveling through veins is not under pressure from the beating heart. Atherosclerosis develops when a substance called plaque builds up in the walls of the arteries. Vasoconstriction is regulated by the autonomic nervous system. They adapt to local needs and exhibit heterogeneity, influencing the surrounding tissues they perfuse. The tiniest arteries, which connect to capillaries, are known as arterioles Vasodilators are medications that open your blood vessels. (See circulatory system. Sep 12, 2023 · The circulatory or cardiovascular system is composed of the heart, blood vessels and the blood. Feb 14, 2024 · Artery vs Vein vs Capillary Blood vessels are small tube-like structures that transport blood inside your body. Veins are called Definition The lumen refers to the interior space or cavity of a tubular structure, such as blood vessels. Nov 7, 2023 · Atherosclerosis causes heart attacks, strokes, and peripheral vascular disease. This thickening can narrow the vessels. These tubes are a super important part of your circulatory system. Oct 18, 2025 · Human cardiovascular system, organ system that conveys blood through vessels to and from all parts of the body, carrying nutrients and oxygen to tissues and removing carbon dioxide and other wastes. Oct 30, 2024 · Sometimes people mistake a broken blood vessel in the front of the eye for a hyphema. Endothelial cells are a type of epithelial Define Blood vessels. Arterial Vasodilation is the process in which blood vessels widen due to the relaxation of smooth muscle fibers in the vessel walls. ). [1] It results from relaxation of smooth muscle cells within the vessel walls, in particular in the large veins, large arteries, and smaller arterioles. Your collateral circulation provides alternative routes for blood flow. Veins are vessels that return blood to the heart. These vessels, including arteries, veins, and capillaries, are essential for delivering oxygen and nutrients to tissues while removing waste products like carbon dioxide. When the pressure increases, vessels distend or swell, and when the pressure decrease, their volume decreases. Blood vessels carry oxygen blood throughout your body, then deliver it back to your heart. Jan 15, 2017 · Dilated Nontortuous Retinal Veins Degenerative changes to the vessel wall can occur secondary to chronic hypertension and atherosclerosis. They form a vast network of structures, from large arteries and veins to the smallest capillaries. Circulatory system In vertebrates, the circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the body. Aug 14, 2025 · What is hypertension or high blood pressure? High blood pressure, also known as HBP or hypertension, is when your blood pressure, the force of the blood flowing through your blood vessels, is consistently too high. The heart, as discussed in the previous chapter, pumps blood throughout the body in a network of blood vessels. Blood vessels in human body are components of the circulatory system that allow the blood to circulate from the heart to the different parts of the body and vice-versa. Blood vessels also circulate blood throughout the circulatory system. This process begins before you’re born and continues throughout your life. Nov 3, 2023 · Major arteries By definition, an artery is a vessel that conducts blood from the heart to the periphery. Blood hypercoagulability can occur due to a blood dyscrasia, dysproteinemia and sickle cell disease, as well as other diseases that cause a hypercoagulable state. [6][7][8] Angiogenesis is a normal and vital process in growth and development, as well as in wound healing and in the formation of granulation tissue. The ones that bring blood back to your heart are called veins. From Longman Dictionary of Contemporary English Related topics: Human ˈblood ˌvessel noun [countable] one of the tubes through which blood flows in your body → artery, vein Examples from the Corpus blood vessel • He was well beaten and in a later race broke a blood vessel. Veins are called Veins are blood vessels located throughout your body that collect oxygen-poor blood and return it to your heart. A subconjunctival hemorrhage does not hurt. Definition Blood vessels are the tubular structures that transport blood throughout the body, playing a crucial role in the circulatory system. Reduced vascular compliance is associated with various neurodegenerative diseases and can lead to complications like vasospasm. Oxygen (bound to hemoglobin in red blood cells) is the most critical Oct 15, 2025 · Blood vessel, a vessel in the human or animal body in which blood circulates. When used without qualification, the term "blood pressure" refers to the pressure in a brachial artery, where it is most commonly measured. There are three major types of blood vessels. People with high blood pressure may not feel symptoms. Description Structure All blood vessels (except capillaries) share a similar three-layered structure. It is also prevented from flowing backward by valves in the larger veins, as illustrated in Figure 17 4 3. They wrote this in the "Handbook of Physiology" in 1963 in work entitled "Pulsatile Flow in the Vascular System". Vasoconstriction may be slight or severe. Blood pressure is usually expressed in terms of the systolic pressure Oct 30, 2023 · These vessels are the primary sites of white blood cell (leukocyte) migration into interstitial fluid of surrounding tissues, particularly in the setting of infection or tissue injury. The largest artery in the body is the aorta and it is divided into four parts: ascending aorta, aortic arch, thoracic aorta, and abdominal aorta. A hyphema must be treated properly or it can cause permanent vision problems. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. Compliance of blood vessels also referred to as distensibility or capacitance, is defined as the ability of a blood vessel to adjust the blood pressure and increase the volume of blood that it can hold. An artery is a blood vessel that carries blood away from the heart, where it branches into ever-smaller vessels. “Cerebro” refers to your brain and “vascular” refers to your blood vessels (arteries and veins). Virtually every cell, tissue, organ, and system in the body is impacted by the Our large, complex bodies need blood to deliver nutrients to and remove wastes from our trillions of cells. Normal blood vessel (left) vs. Arteries get smaller as they move further from the heart. It Apr 30, 2022 · Arteries Arteries, a critical part of your cardiovascular system, are blood vessels that distribute oxygen-rich blood to your entire body. Aug 28, 2023 · Vascular compliance refers to the relationship between the volume of blood within a segment and the blood pressure generated by that volume. The integrity and functionality of blood vessels are vital for maintaining Jul 18, 2020 · Definition Vasoconstriction is the narrowing or even closing of the lumen of a vein, artery, or arteriole as a result of smooth muscle cell constriction in the blood vessel wall. Besides veins, they include arteries and capillaries. Blood flows through arteries largely because it is under pressure from the pumping action of the heart. Blood vessels function to transport blood to an animal's body tissues. It Jul 21, 2021 · Blood vessel Definition noun, plural: blood vessels Any of the vessels in cardiovascular system and functions by carrying blood throughout the body of an animal Supplement The blood vessels are one of the major components of the cardiovascular system. Blood vessels that carry blood away from your heart are called arteries. Feb 12, 2025 · Blood vessels are tubes that carry blood throughout your body. Tiny, tiny vessels called capillaries connect arteries and veins. A condition called atherosclerosis can slow down blood flow through your arteries. Blood is carried through the body via blood vessels. any of the tubes through which blood flows in the body 2. Cardiovascular diseases (CVDs) are the leading cause of death globally, involving heart and blood vessel disorders like coronary heart disease and stroke. What is blood-vessel? Meaning of blood-vessel medical term. The swelling makes it hard for blood to flow through your affected vessels, which can cause organ and tissue damage. Blood fl Sep 21, 2022 · What is angiogenesis? Angiogenesis is the process that forms new capillaries out of existing blood vessels in your body. It gets help moving along by the squeezing action of skeletal muscles, for example, when you walk or breathe. Disturbances in blood flow can lead to tissue injury and loss of bodily functions. Looking for online definition of blood-vessel in the Medical Dictionary? blood-vessel explanation free. Most people can manage their symptoms with medication. What is Vasoconstriction Blood vessels are defined as conduits that facilitate the exchange of nutrients, gases, and signaling factors between organ systems in the body, playing a crucial role in communication and development during organogenesis. Vascular compliance refers to the ability of blood vessels to stretch and expand in response to pressure changes while maintaining their structural integrity. May 17, 2018 · Blood Vessels Definition Blood vessels compose a continuous system of channels through which blood transports oxygen and nutrients to and waste materials from all body tissues. 4 compares vessel diameter, total cross-sectional area, average blood pressure, and blood velocity through the systemic vessels. It has sometimes been called a fluid “tissue,” because like solid tissues it contains several types of cells which perform complex functions for the human body. This widening decreases vascular resistance and increases blood flow, affecting various physiological processes such as blood pressure regulation, nutrient delivery, and thermoregulation. BLOOD VESSEL meaning: 1. However, too much vasoconstriction can cause certain health problems. It is common but can be serious if not treated. A buildup of fats, cholesterol and other substances in and on the artery walls, a condition called atherosclerosis, usually causes coronary artery disease. AI generated definition based on Hemangiomas are noncancerous growths that form from malfunctioning blood vessels. Blood vessels include a network of arteries, arterioles, capillaries, venules, and veins. It moves blood all around your body. Definition of blood vessel noun in Oxford Advanced Learner's Dictionary. They also link to capillaries to exchange oxygen, nutrients and waste. Blood vessels are a network of tubes in the body that carry blood throughout the circulatory system, including arteries, veins, and capillaries. They control your blood pressure and blood flow throughout your body, using their muscles to change their diameter. See examples of BLOOD VESSELS used in a sentence. • On Blood Vessels After blood is pumped out of the left ventricle through the aorta, it is carried throughout the body via systemic arteries. The only way to know is to get your blood pressure checked. The components of blood pressure include systolic pressure, which results from ventricular contraction, and diastolic pressure, which results from ventricular relaxation. Oct 30, 2023 · Coagulation Coagulation factors (proteins) are solved in the blood and stop bleeding after a complex (cascade-like) activation of coagulation factors through damage to blood vessels finally leading to the building of thrombus (thrombogenesis). [2] Blood vessel walls are composed of endothelial tissue and a basal membrane lining the lumen of the vessel Blood pressure may be measured in capillaries and veins, as well as the vessels of the pulmonary circulation; however, the term blood pressure without any specific descriptors typically refers to systemic arterial blood pressure—that is, the pressure of blood flowing in the arteries of the systemic circulation. Arteries Arteries are defined as blood vessels that carry blood away from the heart. AI generated definition based on: Current Topics in Developmental Feb 5, 2025 · Overview Vasculitis involves swelling and irritation, called inflammation, of blood vessels. The classic definition by MP Spencer and AB Denison of compliance ( ) is the change in arterial blood volume ( ) due to a given change in arterial blood pressure ( ). Pulse, the expansion and recoiling of an artery, reflects the blood vessel A generic term for a tube lined by endothelium and usually invested with a muscle layer of varying thickness, which transports blood to peripheral tissues and back. Vasodilation is the medical term for when blood vessels in your body widen, allowing more blood to flow through them and lowering your blood pressure. The characteristics of the lumen, including its diameter, influence how easily blood can circulate and how the vessel walls respond to physiological Jul 5, 2022 · Arterioles Arterioles, small blood vessels that carry blood away from your heart, are connectors between your arteries and capillaries. Arteries branch into ever-smaller vessels called arterioles (ar-TĒR-ē-ōlz) and eventually into tiny vessels called capillaries. Understanding vasodilation helps to connect it to how blood vessels function Aug 17, 2023 · Vasculitis Vasculitis is an autoimmune disease that causes inflammation in your blood vessels. The inflammation can cause the walls of the blood vessels to thicken. Simultaneously, fibrinogen/fibrin prevents the pathological development of blood clots in the blood Blood pressure (BP) is the pressure of circulating blood against the walls of blood vessels. An elastic tubular channel, such as an artery, a vein, or a capillary, through which the blood circulates. • The most critical is a life-threatening weakness in the aorta -- the major blood vessel from the heart. Sep 30, 2024 · Explore the anatomy of arteries, their various types, essential functions in blood circulation, and common diseases affecting these vital blood vessels. Jun 6, 2017 · Endothelium Definition The endothelium is a layer of cells that lines the blood vessels and lymph vessels of the body. The functions of the blood vessels include supplying all organs and tissues of the body with oxygen and nutrients. 2. Arteries, veins, and capillaries are all kinds of blood vessels. Dec 17, 2024 · Vasoconstriction is the narrowing (constriction) of blood vessels by small muscles in their walls. It may result from disease, medicines, or psychological conditions. Blood vessels are the part of the cardiovascular system that transports blood throughout the human body. The first vessels in the developing embryo form through vasculogenesis, after which angiogenesis is responsible for most, if not all, blood vessel growth during development and in disease. It includes the cardiovascular system, or vascular system, that consists of the heart and blood vessels (from Greek kardia meaning heart, and Latin vascula meaning vessels). Most of this pressure results from the heart pumping blood through the circulatory system. General term for arteries, veins, and capillaries that transport blood throughout the body. Explore the types of vessels, their functions, and their anatomy. [4] Arterial compliance is an index of the elasticity of large arteries such as the thoracic aorta. In general, arteries and arterioles transport oxygenated blood from the lungs to the body and its organs, and veins and venules transport deoxygenated blood from the body to the lungs. These four main organs have specific roles and functions, which work together to keep us active and healthy. Your heart and all your blood vessels work together to make up this amazing system. There are three types How can this phenomenon be explained? Figure 20. Eventually, the smallest arteries, vessels called arterioles, further branch into tiny capillaries, where nutrients and wastes are exchanged, and then combine with other vessels that exit capillaries to form venules, small blood Blood pressure is the force that blood exerts upon the walls of the blood vessels or chambers of the heart. VESSEL meaning: 1 : a ship or large boat; 2 : a vein or artery that carries blood through the body blood vessel The circulatory system is like your body's transportation network. Learn more about the vascular disease types, causes, and treatment. Arteriosclerosis happens when the blood vessels that carry oxygen and nutrients from the heart to the rest of the body become thick and stiff. By reducing the diameter of a blood vessel, circulating blood must move through a smaller area under higher pressures. 6 days ago · The meaning of BLOOD VESSEL is any of the vessels through which blood circulates in the body. BLOOD VESSEL meaning: a small tube that carries blood to different parts of a person or animal's body Vasoconstriction, making blood vessels smaller, is necessary for your body at times. Notice in part (b) that the total cross-sectional area of the body’s capillary beds is far greater than any other type of vessel. A tube through which the blood circulates in the body. The innermost layer, called the tunica intima, is composed of a monolayer of endothelial cells called the endothelium Aug 14, 2025 · Blood vessels definition: The flexible tubular canals through which blood circulates in the body. Veins are blood vessels located throughout your body that collect oxygen-poor blood and return it to your heart. Eventually, the smallest arteries, vessels called arterioles, further branch into tiny capillaries, where nutrients and wastes are exchanged. They deliver blood to Aspects of flow mechanics in blood vessels that are applicable to all types of vessels are then considered, including Poiseuille’s law for flow in a tube, the rheological properties of blood, and the overall structure of the systemic circulation as it relates to blood flow. Apr 30, 2025 · Learn about blood vessels in the human body. You may need vasodilators to treat certain heart conditions or high blood pressure. Let’s learn more Blood vessels are defined as the transport medium within the body that move blood from the heart to tissues and back, facilitating the exchange of gases, nutrients, and other substances. Virtually every cell, tissue, organ, and system in the body is impacted by the Vasoconstriction is the narrowing (constriction) of blood vessels by small muscles in their walls. Blood vessel compliance is defined as the ability of blood vessels to respond to fluctuations in vascular load, which is crucial for maintaining adequate blood flow to the brain and preventing conditions such as vascular dementia. any of the tubes through which blood…. If the narrowing restricts blood flow, it can damage organs and tissues. So, . Collecting venules are larger venules that drain postcapillary venules. But there's a difference between the two terms. Learn about causes, symptoms, risk factors, diagnosis, and treatments. In the context of blood vessels, the lumen is crucial as it is the pathway through which blood flows, affecting blood pressure and volume. It's a crucial physiological parameter that influences blood pressure regulation and overall cardiovascular health. They bring oxygen and nutrients to your tissues and take away waste. When blood vessels constrict, blood flow is slowed or, in extreme cases, completely blocked. Learn how they work and what to do about them. Things that increase the risk of having high blood pressure include: older age genetics being overweight or Compliance of blood vessels also referred to as distensibility or capacitance, is defined as the ability of a blood vessel to adjust the blood pressure and increase the volume of blood that it can hold. These tube-like vessels and the muscles inside them ensure your organs and tissues have the oxygen and nutrients they need to function. Jul 23, 2025 · What are Blood Vessels? Definition: Blood vessels are tubular structures that transport blood throughout the body. It delivers essential substances to the cells of the body. Veins, arteries and capillaries are blood vessels. Although you probably don’t know it exists, your epithelium is vital to keeping you alive! It includes all blood-and-lymph carrying vessels, including the chambers of the heart and the glomeruli, or “filters,” of the kidneys. Here is a comprehensive note on blood vessels, their types, functions, and significance in the circulatory system: Feb 11, 2024 · Vascular disease is any abnormal condition of your blood vessels (arteries and veins). These blood vessels are The human circulatory system consists of the heart, blood cells, lymphatic system and network of blood vessels. They include removing waste products, fluid balance, and other functions. Angiogenesis helps your body heal from wounds and perform other vital functions. By the end of this section, you will be able to: Compare and contrast the three tunics that make up the walls of most blood vessels Distinguish between elastic arteries, muscular arteries, and arterioles on the basis of structure, location, and function Compare and contrast the three types of capillaries on the basis of structure, location, and function Describe the basic structure of a Jan 10, 2024 · Cardiovascular disease (CVD) can refer to many conditions: Heart disease Heart and blood vessel disease, also called heart disease, includes numerous problems, many of which are related to atherosclerosis. If a blood clot Oct 16, 2023 · Blood vessels are a vital circulatory system component responsible for transporting blood throughout the body. They play a crucial role in transporting oxygen, nutrients, hormones, and waste products to and from cells, helping maintain homeostasis and overall health. Medicines that cause vasoconstriction include: Decongestants, including pseudoephedrine Cough Jul 26, 2017 · Blood is the body fluid in humans and other animals that delivers the essential materials for life to the body's cells. In simpler terms, it measures how easily a vessel can expand or contract in response to changes in blood volume. Oct 18, 2023 · The circulatory system, which is also called the vascular system or cardiovascular system, consists of the systemic circulation, pulmonary circulation, the heart, and the lymphatic system. 8 Our large, complex bodies need blood to deliver nutrients to and remove wastes from our trillions of cells. Blood vessels synonyms, Blood vessels pronunciation, Blood vessels translation, English dictionary definition of Blood vessels. 8zmydjdk6tv5fnjiutgshvzrsx1s9qbrtjzi2xw9