define arterioles
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- An arteriole is a small-diameter blood vessel in the microcirculation that extends and branches out from an artery and leads to capillaries. Arterioles have muscular walls and are the primary site of vascular resistance. The greatest change in blood pressure and velocity of blood flow occurs at the transition of arterioles to capillaries.
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- Definition of DUCTUS ARTERIOSUS. : a short broad vessel in the fetus that connects the pulmonary artery with the aorta and conducts most of the blood directly from the right ventricle to the aorta bypassing the lungs.
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Arteriole An arteriole is a small-diameter blood vessel in the microcirculation that extends and branches out from an artery and leads to capillaries. Arterioles have muscular walls (usually only one to two layers of smooth muscle) and are the primary site of vascular resistance.
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The Heart and Blood Vessels Arterioles are the smallest arteries in the body. They deliver blood to capillaries. Arterioles are also capable of constricting or dilating and, by doing this, they control how much blood enters the capillaries. Capillaries are tiny vessels that connect arterioles to venules.They have very thin walls which allow nutrients from the blood to pass into the body tissues. Waste products from body tissues can also pass into the capillaries. For this reason, capillaries are known as exchange vessels.Groups of capillaries within a tissue reunite to form small veins called venules. Venules collect blood from capillaries and drain into veins. Veins are the blood vessels that carry blood back to the heart.enules take blood from the capillaries to the veins. Veins take blood back to the heart. This constant circulation of blood keeps us alive. Your blood vessels also play a part in the regulation of your blood pressure. Certain chemicals in the body can cause our blood vessels either to contract or dilate.
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- Atherosclerosis (also known as arteriosclerotic vascular disease or ASVD) is a specific form of arteriosclerosis in which an artery wall thickens as a result of invasion and accumulation of white blood cells (foam cells) and proliferation of intimal-smooth-muscle cell creating an atheromatous (fibrofatty) plaque.
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artery 1. a blood vessel that conveys blood from the heart to any part of the body. 2. a main channel or highway, esp. of a connected system with many branches. [1350–1400; Middle English < Latin artēria < Greek artēría windpipe, artery]
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- Medical Definition of CENTRIOLE. : one of a pair of cellular organelles that occur especially in animals, are adjacent to the nucleus, function in the formation of the spindle apparatus during cell division, and consist of a cylinder with nine microtubules arranged peripherally in a circle. one of a pair of cellular organelles that occur especially in animals, are adjacent to the nucleus, function in the formation of the spindle apparatus during cell division, and consist of a cylinder with nine microtubules arranged peripherally in a circle.
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Anatomy Lesson 11 Circulatory System Arteriosclerosis is a group of diseases of the arteries. One of the most common types of arteriosclerosis is atherosclerosis, a condition in which fatty deposits of cholesterol form in the arteries. These deposits can break away and travel to the heart or brain, causing heart attacks or strokes.
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- Medical Definition of ARTERIOLITIS. : inflammation of the arterioles.What made you want to look up arteriolitis? Please tell us where you read or heard it (including the quote, if possible). View Seen & Heard Highlights from Around the Site. Test Your Vocabulary!Test Your Vocabulary!edical Definition of ARTERIOLITIS. : inflammation of the arterioles. What made you want to look up arteriolitis?
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- Definitions: 1. Narrowing of the caliber of an artery, either temporary, through vasoconstriction, or permanent, through arteriosclerosis. The definition information for arteriostenosis is provided by Stedman's.
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Blood Vessels, Ch. 19 Arterioles branch into capillaries, the smallest of all blood vessels. Capillaries are the sites of nutrient and waste exchange between the blood and body cells. Capillaries are microscopic vessels that join the arterial system with the venous system.
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ch. 18 & 19 arteries, veins & functions of vessels A blood vessel that carries blood away from the heart chambers, have muscular walls to regulate blood flow and are typically high-pressure vessles. Arterioles. Blood vessels that are smaller branches off of arteries. Called resistance vessels.
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Where are arterioles located? The structure of an arteriole is:             Arterioles are tiny branches of arteries that lead to capillaries.   These are also under the co … ntrol of the sympathetic nervous system, and constrict and dialate, to regulate blood flow.rterioles are small diameter vessels that branch off of your arteries. They inevitably connect arteries to capillaries. You can find them pretty much anywhere in your body.
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Angiography Unsourced material may be challenged and removed. (April 2014) Angiography or arteriography is a medical imaging technique used to visualize the inside, or lumen, of blood vessels and organs of the body, with particular interest in the arteries, veins, and the heart chambers.
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Overview Arteriosclerosis / atherosclerosis. Overview. Arteriosclerosis occurs when the blood vessels that carry oxygen and nutrients from your heart to the rest of your body (arteries) become thick and stiff — sometimes restricting blood flow to your organs and tissues.
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- Arterioles are the smallest arteries and regulate blood flow into capillary beds through vasoconstriction and vasodilation. Capillaries are the smallest vessels and allow for exchange of substances between the blood and interstitial fluid.
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What is the function of arteriole? An arteriole is a very small blood vessel that leads an artery to a  capillary. The main function of the arteriole is to change the  blood pressure and velocity of blood flo … w. Answered. In Human Anatomy and Physiology.
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- 1 Venules are similar to arterioles as they are small vessels that connect capillaries, but unlike arterioles, venules connect to veins instead of arteries. 2  Venules pick up blood from many capillaries and deposit it into larger veins for transport back to the heart.
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What is an Arteriole? You won't believe these 10 facts about people. An arteriole is a small blood vessel that forms a connection between small arteries and capillaries. Arterioles are an important part of the circulatory system.rom the arteriole, blood passes into the capillaries. Pores in the walls of the capillaries allow for the exchange of nutrients and wastes that are carried away in the venules connected at the other side. Ad.
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arteriosclerosis obliterans arteriosclerosis obliterans. Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia. arteriosclerosis. any of a group of diseases characterized by thickening and loss of elasticity of the arterial walls; popularly called “hardening of the arteries.” Symptoms depend on the organ system involved. adj., adj arteriosclerot´ic.ƒ.
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- An artery (plural arteries) (from Greek ἀρτηρία (artēria), meaning 'windpipe, artery') is a blood vessel that takes oxygenated blood from the heart to all parts of the body. The two exceptions to this rule are the pulmonary and the umbilical arteries.
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Microcirculation The microcirculation is composed of terminal arterioles, capillaries, and venules that drain capillary blood. The vessels on the arterial side of the microcirculation are called the arterioles, which are well innervated, are surrounded by smooth muscle[citation needed]cells, and are 10-100 µm in diameter.
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- Noun. 1. centriole-one of a pair of small cylindrical cell organelles near the nucleus in animal cells; composed of nine triplet microtubules and form the asters during mitosis. cell organ, cell organelle, organelle-a specialized part of a cell; analogous to an organ; the first organelle to be identified was the nucleus.entriole. 1. Either of two organelles near the nucleus involved in cell division. 2. One of a group of tiny tubules near the nucleus of a cell. Centrioles play a part in cell division.
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Arteriole An arteriole /ɑrˈtɪəri.oʊl/ is a small diameter blood vessel in the microcirculation that extends and branches out from an artery and leads to capillaries. Arterioles have muscular walls (usually only one to two layers of smooth muscle) and are the primary site of vascular resistance. The greatest change in blood pressure and velocity of blood flow occurs at the transition of arterioles to capillaries. The decreased velocity of flow in the capillaries reduces the pressure and increases exchange of gas and nutrients. Arterioles receive autonomic nervous system innervation and respond to various circulating hormones in order to regulate their diameter. Retinal vessels lack a functional sympathetic innervation.
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ductus arteriosus Definition of ductus arteriosus : a short broad vessel in the fetus that connects the pulmonary artery with the aorta and conducts most of the blood directly from the right ventricle to the aorta bypassing the lungs