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Blood Vessel Flashcards

Blood Vessel Flashcards
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Tunica Adventitia

The strong layer of connective tissue and collagen fibers that make up the outermost layer of veins and arteries

Acts as an anchor between blood vessels and the tissues that surround them

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Vasodilation
The process by which blood vessels are widened through the relaxation of the smooth muscles in the tunica media, leading to a pressure decrease and blood flow increase in the vessel
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Vasoconstriction
The process by which blood vessels are narrowed through the contraction of the smooth muscles in the tunica media, leading to a pressure increase and blood flow decrease in the vessel
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Tunica Media
The middle layer of veins and arteries, which contains smooth muscle (more in arteries than veins) for constricting and dilating the blood vessels
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Tunica Intima

A thin layer of endothelial cells that make up the innermost layer of veins and arteries

The only layer found in capillaries, allowing for gas and nutrient exchange in capillary beds

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Artery
A thick-walled blood vessel under high pressure that carries blood from the heart to the body's tissues
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Vein

A thin-walled blood vessel under low pressure that carries blood from tissues to the heart

Uses one-way valves to push blood up against gravity, preventing it from pooling in lower extremities

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Capillaries
Tiny, thin blood vessels made up of a single endothelial cell layer that are the site of gas and nutrient exchange between the circulatory system and the body's tissues
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17 cards in set

Flashcard Content Overview

When asked to name important organs in the body, most people will answer with things like the heart or the lungs. Though they are crucial organs, both would be rendered useless without the transportation system that moves their products around: the blood vessels. Found connected to every tissue and organ in the body, blood vessels are essential for shipping the important materials our bodies need to function. Use these flashcards to review the major blood vessels in the body and how they work.

Front
Back
Capillaries
Tiny, thin blood vessels made up of a single endothelial cell layer that are the site of gas and nutrient exchange between the circulatory system and the body's tissues
Vein

A thin-walled blood vessel under low pressure that carries blood from tissues to the heart

Uses one-way valves to push blood up against gravity, preventing it from pooling in lower extremities

Artery
A thick-walled blood vessel under high pressure that carries blood from the heart to the body's tissues
Tunica Intima

A thin layer of endothelial cells that make up the innermost layer of veins and arteries

The only layer found in capillaries, allowing for gas and nutrient exchange in capillary beds

Tunica Media
The middle layer of veins and arteries, which contains smooth muscle (more in arteries than veins) for constricting and dilating the blood vessels
Vasoconstriction
The process by which blood vessels are narrowed through the contraction of the smooth muscles in the tunica media, leading to a pressure increase and blood flow decrease in the vessel
Vasodilation
The process by which blood vessels are widened through the relaxation of the smooth muscles in the tunica media, leading to a pressure decrease and blood flow increase in the vessel
Tunica Adventitia

The strong layer of connective tissue and collagen fibers that make up the outermost layer of veins and arteries

Acts as an anchor between blood vessels and the tissues that surround them

Pulmonary Circuit
The circulation of blood from the heart, to the lungs, then back to the heart
Pulmonary Trunk

A large artery that fills with deoxygenated blood from the right ventricle of the heart following the opening of the pulmonary semilunar valve

Connects to the left and right pulmonary arteries

Pulmonary Arteries
Two arteries (left and right) that carry deoxygenated blood from the pulmonary trunk to the lungs
Aorta
The largest artery found in the body which functions in carrying blood away from the heart from the left ventricle to the rest of the body
Coronary Arteries

Two arteries (left and right) that carry oxygenated blood to the heart muscle

When blocked due to plaque build-up, can lead to a heart attack

Aortic Arch

A branching portion of the aorta that is shaped like an upside-down 'U'

Responsible for supplying the arms, neck, head, and brain with oxygenated blood

Descending Aorta
The portion of the aorta occurring after the aortic arch that is made up of the thoracic (in the thorax of the body) and abdominal (in the abdominal cavity of the body) aorta
Common Iliac Arteries

Two arteries (left and right) branching off of the end of the abdominal aorta near the ilium

Supplies oxygenated blood to the rectum, bladder, reproductive organs, legs, and feet

Venae Cavae

Largest veins in the body, formed from the consecutive merging of smaller veins

Includes the superior (upper) and inferior (lower) vena cava

Function in returning deoxygenated blood to the heart

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