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An elastic lamina on both sides of the tunica media is a characteristic of what?
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∙ 14y ago
An elastic artery, e.g. aorta
Wiki User
∙ 14y ago
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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.
Is especially thick in elastic arteries?
tunica media
Does tunica media of elastic arteries contains more elastic fibers than muscular arteries?
true
The main component of the tunica media of muscular arteries is?
Tunica Media or just Media is the central layer of arteries or veins. In the artery, it is composed of elastic tissue and smooth cell muscles.
What layer of an artery consists mostly of smooth muscle?
Arterial walls are more muscular than the walls of veins. This muscle is smooth involuntary muscle.
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.
What are the characteristics of a muscular vein?
The tunica interna of a muscular vein consists of an endothelium with a basal lamina, a thin subendothelial layer with smooth muscle cells, and a thin internal elastic membrane. Its tunica media has several layers of circularly arranged smooth muscle cells dispersed with collagen and elastic fibres. The smooth muscle cells may be arranged longitudinally in its tunica media. Its externa is generally thicker than its tunica media and has collagen fibres and a network of elastic fibres.
Which tunic is especially thick in elastic arteries?
Arterial walls are made up of three layers: the tunica intima, tunica media, and tunica externa. The tunica media is the thickest layer in arteries.
Is especially thick in elastic arteries?
tunica media
What is the middle muscle layer in a blood vessel called?
The three layers of the arterial wall are, from outside to inside, the adventia, the media and the intima. A flat layer of cells, called endothelial cells, forms a boundary between the blood in the lumen, or cavity, and the innermost layer of the arterial wall. Its called tunica intima "The tunica media is the middle layer in a blood vessel wall and is composed predominantly of smooth muscle reinforced by organised layers of elastic tissue which form elastic laminae. The tunica media is particularly prominent in arteries, being relatively indistinct in veins and virtually non-existent in very small vessels. The tunica media also contains autonomic nerves. In vessels which are close to the heart, receiving the full thrust of the systolic pressure wave, elastic tissue is very well developed, hence the term elastic arteries. In muscular arteries and arterioles the prominent elastic lamina just below the tunica intima is termed the internal elastic lamina."http://greenfield.fortunecity.com/rattler/46/comparison_of_types_of_vessels.htm
Does tunica media of elastic arteries contains more elastic fibers than muscular arteries?
true
The tunica media of the aorta would have a much greater proportion?
Elastic fibres
The main component of the tunica media of muscular arteries is?
Tunica Media or just Media is the central layer of arteries or veins. In the artery, it is composed of elastic tissue and smooth cell muscles.
Which tunic of an artery is most responsible for maintaining blood pressure?
Tunica Media
What layer of an artery consists mostly of smooth muscle?
Arterial walls are more muscular than the walls of veins. This muscle is smooth involuntary muscle.
What are the different layers of the blood vessel walls called?
1.Tunica intima (Latin for innermost coat) is the innermost layer. Includes the endothelial lining and an underlying layer of connective tissue with a variable number of elastic fibers. In arteries the outer margin of the tunica intima cointains a thick layer of elastic fibers called the internal elastic membrane.2.Tunica media (Latin for middle coat) is the middle layer. Contains concentric sheets of smooth muscle tissue in a framework of loose connective tissue. The collagen fibers bind the tunica media to the tunica intima and tunica externa. Commonly the thickest layer in the wall of a small artery, the tunica media es separated from the surrounding tunica externa by a thin band of elastic fibers called external elastic membrane. The smooth muscle cells of the tunica media encircle the endothelium linning the lumen of the blood vessel. When these smooth muscles contract, the vessel decreases in diameter; when they relax, the diameter increases. Large arteries also contain layers of longitudinally arrranged smooth muscle cells.3.Tunica externa (Latin for outside coat) or tunica adventitia (Latin for coat that comes first) is theoutermost layer. Forms a connective tissue sheath. In arteries, this layer contains collagen fibers with scattered bands of elastic fibers. In veins, it is generally thicker than the tunica media and contains networks of elastic fibers and bundles of smooth muscle cells. The connective tissue fibers of the tunica externa typically blend into those of adjacent tissues, stabilizing and anchoring the blood vessel.
What are the three tunics of both arteries and veins?
The tunica intima is the innermost layer containing mostly endothelium, the one through which the lumen runs. Surrounding this is tunica media which mostly muscle tissue. And finally surrounding this is the outermost layer, the tunica adventitia which is mostly connective tissue.
