Which blood vessel has elastic layers in its walls?

Which blood vessel has elastic layers in its walls?

Elastic arteries
Elastic arteries are those nearest the heart (aorta and pulmonary arteries) that contain much more elastic tissue in the tunica media than muscular arteries. This feature of the elastic arteries allows them to maintain a relatively constant pressure gradient despite the constant pumping action of the heart.

Which type vessel has an internal and an external elastic membrane?

MUSCULAR (DISTRIBUTING) ARTERIES In muscular arteries, smooth muscle becomes the predominant constituent of the tunica media. Internal and external elastic laminae are prominent.

What is the external elastic membrane?

A layer of elastic connective tissue lying immediately outside the smooth muscle of the tunica media of an artery. Also called external elastic layer.

Do veins have external elastic lamina?

Veins do not have an internal elastic membrane. The tunica media is relatively thin. The tunica adventitia is the thickest tunic and there is no external elastic membrane.

What are the layers of blood vessels from outside to inside quizlet?

Terms in this set (25)

• Tunica interna (tunica intima) -inner layer that is directly exposed to blood. -composed of simple squamous epithelium (endothelium or endothelial lining) -contains a basement membrane.
• tunica media. -middle layer. -composed of smooth muscle fibers.
• tunica externa (tunica serosa or tunica adventitia)

Does elastic artery have external elastic lamina?

The vasa vasorum, a network of small vessels that supplies the cells of larger vessels, is present in their adventitia and outer part of the media. Muscular arteries follow the elastic arteries. There is no external elastic lamina, and the adventitia consists of a thin layer of collagen and isolated elastic fibers.

Do capillaries have elastic fibers?

It consists of circularly arranged elastic fibers, connective tissue, and smooth muscle cells. Capillaries consist of a single layer of endothelium and associated connective tissue.

Do capillaries have Tunica interna?

Capillaries have only a tunica intima layer. The tunica intima is a thin layer composed of a simple squamous epithelium known as endothelium and a small amount of connective tissue. The tunica media is a thicker area composed of variable amounts of smooth muscle and connective tissue.

Which layer of the blood vessel wall is composed of elastic tissue and smooth muscle cells quizlet?

The TUNICA MEDIA (medius=middle) is the middle layer of the vessel wall. It’s composed predominantly of circulatory arranged layers of smooth muscle cells that are supported by elastic fibers.