what is venous
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- Venous blood. Venous blood is deoxygenated blood which travels from the peripheral vessels, through the venous system into the right atrium of the heart. Deoxygenated blood is then pumped by the right ventricle to the lungs via the pulmonary artery which is divided in two branches, left and right to the left and right lungs respectively. Blood is oxygenated in the lungs and returns to the left atrium through the pulmonary veins.
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Vein (geology) In geology, a vein is a distinct sheetlike body of crystallized minerals within a rock. Veins form when mineral constituents carried by an aqueous solution within the rock mass are deposited through precipitation. The hydraulic flow involved is usually due to hydrothermal circulation.
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vein vein. 1. Any of the blood vessels that carry blood toward the heart. Veins are thin-walled and contain valves that prevent the backflow of blood. All veins except the pulmonary vein (which returns to the heart from the lungs) carry blood having low levels of oxygen.ein. n. 1. (Anatomy) any of the tubular vessels that convey oxygen-depleted blood to the heart. Compare pulmonary vein, artery. 2. (Zoology) any of the hollow branching tubes that form the supporting framework of an insect's wing.
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Varicose Veins Veins are blood vessels that carry blood from your body's tissues to your heart. Your heart pumps the blood to your lungs to pick up oxygen. The oxygen-rich blood then is pumped to your body through blood vessels called arteries.
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- What is venous reflux? Venous reflux is backward flow in the veins. The job of veins is to circulate blood back to heart. Vein have valve that a supposed to insure that the blood only circulates back toward the heart. When those valves fail the blood flows backward toward the feet and that is called reflux.
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blood vessel vein, vena, venous blood vessel-a blood vessel that carries blood from the capillaries toward the heart; all veins except the pulmonary vein carry unaerated blood. capillary vessel, capillary-any of the minute blood vessels connecting arterioles with venules. cardiovascular system, circulatory system-the organs and tissues involved in circulating blood and lymph through the body.
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blood blood. n. 1. (Physiology) a reddish fluid in vertebrates that is pumped by the heart through the arteries and veins, supplies tissues with nutrients, oxygen, etc, and removes waste products. It consists of a fluid (see blood plasma) containing cells (erythrocytes, leucocytes, and platelets).lood. 1. The fluid that circulates through the body of a mammal or other vertebrate animal by the action of the heart, carrying oxygen and nutrients to the body's cells and removing waste products from them.
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Varicose Veins What are Varicose Veins? Veins are blood vessels that return deoxygenated blood from the outer parts of the body back to the heart and lungs. When veins become abnormally thick, full of twists and turns, or enlarged, they are called varicose vein. This happens most commonly in the veins in the legs and thighs. 1  The thickened, twisting or dilated parts of the vein are called varicosities. 2  Varicose veins can form anywhere in the body, but they are most often located in the legs. 3  Varicose veins tend to be inherited, and become more prominent as a person ages.
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The Circulatory System Venules. Venules are minute vessels that drain blood from capillaries and into veins. Many venules unite to form a vein. 1  Drains blood from capillaries into veins, for return to the heart.
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vein 1. vein-a blood vessel that carries blood from the capillaries toward the heart; all veins except the pulmonary vein carry unaerated blood. vena, venous blood vessel. accessory cephalic vein, vena cephalica accessoria-a vein that passes along the radial edge of the forearm and joins the cephalic vein near the elbow.
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- A vein is a blood vessel that has a larger lumen, and sometimes veins serve as blood reservoirs or capacitance vessels, containing valves that prevent backflow. This system of vessels in general returns blood to the heart from the periphery (see the image below). Veins: blood flow and valve structure.
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vein Definition of vein for English Language Learners. : 1  any one of the tubes that carry blood from parts of the body back to the heart. : 2  any one of the thin lines that can be seen on the surface of a leaf or on the wing of an insect. : 3  a long, narrow opening in rock filled with gold, silver, etc.
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Veins Veins are the blood vessels which carry the blood from peripheral tissues towards heart. They carry the deoxygenated blood, which is bluish in color and for the same reason veins appear blue. 1  Veins are thin-walled, being thinner than the arteries.  Their lumen is larger than that of the accompanying arteries.
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- venous blood. n. Abbr. v. Blood that has passed through the capillaries of various tissues other than the lungs, is found in the veins, in the right chambers of the heart, and in pulmonary arteries, and is usually dark red as a result of a lower content of oxygen.. Blood that has passed through the capillaries of various tissues other than the lungs, is found in the veins, in the right chambers of the heart, and in pulmonary arteries, and is usually dark red as a result of a lower content of oxygen.
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- Lesson Summary. Veins are an important part of our circulatory system. They are responsible for returning deoxygenated blood back to the heart after arteries carry blood out. The vena cava is the largest vein in the body. Veins have much thinner walls than arteries. Because the pressure within them is low, veins have valves inside them to keep blood flowing only one way. This ensures a successful return of blood to the heart, where the cycle begins all over again.
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Pulmonary Veins Definition: Veins are vessels that bring blood to the heart. Pulmonary veins carry oxygenated blood from the lungs to the left atrium.There are four pulmonary veins which extend from the left atrium to the lungs. They are the right superior, right inferior, left superior, and left inferior pulmonary veins.efinition: Veins are vessels that bring blood to the heart. Pulmonary veins carry oxygenated blood from the lungs to the left atrium.
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- In the circulatory system, veins (from the Latin vena) are blood vessels that carry blood toward the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart.In contrast to veins, arteries carry blood away from the heart.Veins are less muscular than arteries and are often closer to the skin.ost veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart. In contrast to veins, arteries carry blood away from the heart. Veins are less muscular than arteries and are often closer to the skin.
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Varicose Veins Veins are blood vessels that return deoxygenated blood from the outer parts of the body back to the heart and lungs. When veins become abnormally thick, full of twists and turns, or enlarged, they are called varicose vein. This happens most commonly in the veins in the legs and thighs.
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How Veins Transport Blood A vein is an elastic blood vessel that transports blood from various regions of the body to the heart. Veins can be categorized into four main types: pulmonary, systemic, superficial, and deep veins.Pulmonary veins carry oxygenated blood from the lungs to the left atrium of the heart.Systemic veins return deoxygenated blood from the rest of the body to the right atrium of the heart. Superficial veins are located close to the surface of the skin and are not located near a corresponding artery.Deep veins are located deep within muscle tissue and are typically located near a corresponding artery with the same name (for example coronary arteries and veins). vein can range in size from 1 millimeter to 1-1.5 centimeters in diameter. The smallest veins in the body are called venules. They receive blood from the arteries via the arterioles and capillaries.
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What is Venous Sinus Thrombosis? Venous sinus thrombosis is a serious reason of headache. The venous sinuses are the end channels for the drainage of venous blood from the brain. Capillaries in the brain merge and form the cortical vein. The cortical veins also merge and drain venous blood in the venous channels in the dura mater.
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Circulatory Routes The largest veins in the human body are the venae cavae. The superior vena cava carries blood from the arms and head to the right atrium of the heart. The inferior vena cava carries blood from the legs and abdomen to the heart.n the circulatory system, veins (from the Latin vena) are blood vessels that carry blood toward the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart.
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Venous Insufficiency (Venous Reflux) Venous reflux disease, also known as venous insufficiency, is a medical condition affecting the circulation of blood in the lower extremities. Normally, one-way valves in the veins keep blood flowing toward the heart against the force of gravity. When the valves become weak and do not close properly, they allow blood to flow backward and this is a condition called reflux.
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Leg Ulcers (Arterial & Venous) Leg Ulcers (Arterial & Venous) Just the mention of an ulcer is a concern to patients. An ulcer is an area that has lost the covering layer of skin so that the tissues beneath the skin are exposed. While this explanation is simple, it does not say anything about the cause of the ulcer or how it will respond to treatment.
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- © MedValet. Definition: Veins are vessels that bring blood to the heart. Pulmonary veins carry oxygenated blood from the lungs to the left atrium. There are four pulmonary veins which extend from the left atrium to the lungs. They are the right superior, right inferior, left superior, and left inferior pulmonary veins.efinition: Veins are vessels that bring blood to the heart. Pulmonary veins carry oxygenated blood from the lungs to the left atrium. There are four pulmonary veins which extend from the left atrium to the lungs.
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Ultrastructure of Blood Vessels A venule is a small blood vessel in the microcirculation that allows deoxygenated blood to return from the capillary beds to the larger blood vessels called veins. Venules are blood vessels that drain blood directly from the capillary beds.Many venules unite to form a vein. venule is a small blood vessel in the microcirculation that allows deoxygenated blood to return from the capillary beds to the larger blood vessels called veins. Venules are blood vessels that drain blood directly from the capillary beds.
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Blood Venous blood collected during blood donation. Venous blood is deoxygenated blood which travels from the peripheral vessels, through the venous system into the right atrium of the heart.