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They comprise of three layers; inner, middle, and outer.
In the center of the vessel, there is the lumen, which carries the blood. In an artery the lumen is smaller, and in a vein it is much larger.
The tunica intema is the inner layer, and it is made up of the endothelium (the lining of the vessel), specifically squamous epithilium.
The tunica media is the layer of elastic fibres and smooth muscle which allow the lumen to shrink (vasoconstriction) and dilate (vasodilation).
The tunica externa is a layer of collagen. It is the strong part of the vessel, as collagen is a fibrous protein and insoluble in water.
What else can I help you with?
What do arteries and veins drain?
Arteries drain (pump blood) into veins. Veins drain into your lungs and heart to be re-oxygenated. (This is not true for veins and arteries to and from your lungs.)
What two ways are veins structurally different from arteries?
blood travels away from the heart through arteries and blood travels to the heart through the veins
Is the middle layer thicker in veins or arteries?
arteries.
What are the arteries and veins called that service the kidneys of a frog?
Renal arteries and veins service an animal's kidneys.
What is the amount of muscle in veins and arteries?
The amount of muscle in veins and arteries varies in the sense that arteries are more muscular than veins to give them extra elasticity and strength to deal with surges of blood.
Name three blood vessels?
the three blood vessels are the Veins capillaries Arteries the arteries.
What do arteries and veins drain?
Arteries drain (pump blood) into veins. Veins drain into your lungs and heart to be re-oxygenated. (This is not true for veins and arteries to and from your lungs.)
What is the difference between the blood in the arteries and the blood in the veins?
Veins do not pulsate Arteries pulsate Veins can easily collapse Arteries do not collapse (except in shock) Veins contain valves Blood pressure is low in the veins and higher in the arteries
What material surrounds veins and arteries?
Cellulose is what surronds veins and arteries.
What is the difference between muscle in veins and arteries?
Thee difference between muscle in veins and arteries is that muscles of arteries are thicker compared to those of veins.
What two ways are veins structurally different from arteries?
blood travels away from the heart through arteries and blood travels to the heart through the veins
Are veins thicker than arteries?
The tunica media is thicker in arteries than in veins.
What does the blood travel through?
arteries and veins
What are facts your veins and arteries?
if you attach your veins and arteries together,it will go around the world
What are the names of the 3 blood vessles?
Arteries, capillaries, & veins.
What happens in capalaries?
Capillaries are the endpoints of the circulatory system. They are where veins and arteries meet (arteries carry red blood, which comes from the heart, moving toward the capillaries, and veins carry blue blood, which heads from the capillaries toward the heart).
What do veins have that arteries don't have?
Arteries have a pulse
