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These are venous valves.
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∙ 13y ago
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What is tunica intima?
The tunica interna, is a thin layer only a few cells thick of a vein and artery, made up of connective tissue and elastic fibers. It is sometimes referred to as the intima membrane. It is this layer that gives smoothness to the lining of the vessel, enhancing blood flow.
What has the thickest tunica media?
large arteries
The folds of the mucosa on the internal surface of the stomach are called?
They are called gastric folds.
Rugae are folds within the kidney?
false. they are folds within the bladder
What tunic is also called the adventitia?
Tunica externa
Why does tunica interna of the vasoconstricted section of the arteriole exhibit folds?
These are venous valves.
Which tunic of the artery contains endothelium?
tunica media
The tunica interna is continuous with this layer of the heart?
Endocardium
What are the layers that make up the veins?
the layers that make up the heart are the tunica externa, tunica media, and tunica interna.
What is tunica interna?
It lines the lumen of the vessels, and is a thin layer of endothelium.
Are venous valves folds of the tunica externa?
No, the venous valves are folds of the tunica intima, the innermost layer of the vessel.
What is the innermost layer of a blood vessel composed of endothelial cells?
Tunica interna
Which layer of the artery wall thickens most in atherosclerosis?
The tunica media is the thickest layer of of an artery
Which blood vessel tunic is composed of smooth muscle and controls the diameter of the vessel?
Tunica interna
The structure of a capillary wall differs from that of vein or artery because?
it has a single tunic- only the tunica interna
Why do arteries have the thickest walls?
Blood vessels are composed of three layers of tissue: tunica externa, tunica media, and tunica interna. The middle layer, tunica media, is composed of smooth muscle and is thickest in arteries because they need to accommodate the higher pressures created by the heart's pumping action which distributes blood throughout the body.
What are the characteristics of elastic arteries?
The tunica interna of an elastic artery has subendothelial laminas of elastic fibres. Its tunica media has many fenestrated elastic membranes alternating with smooth muscle fibres. An elastic artery also has external elastic lamina. Its tunica externa is thin and contains vasa vasorum.
