Cappillaries In The Chest Describe The Structure And Function Of Atreries, Cappillaries And Vein?

Describe the structure and function of atreries, cappillaries and vein? - cappillaries in the chest

The arteries and veins consist of three layers of the same, yes. There are some important differences.

This is the thin intimal layer next to the light. It consists of simple squamous endothelium and basement membrane, and is the same thickness of arteries and veins. Where a "no stick" layer of the flow in the vessels and veins have valves (similar structure as that of the semilunar heart valves) to help return the blood to the heart. The endothelium is a continuation of the endocardium, the inside of the heart chambers and valves.

The medium is the middle layer of smooth muscle fibers exist. It is much thicker than the arteries, veins, because the arteries are active vasoconstrictors or vasodilators. This helps the body in regulating blood flow into an area and blood pressure. The arteries also have an elastic laminar on either side of the tunica media (not) the veins. This provides a certain elasticity to these vessels, zoom in / out. The thick tunica media and elastic are simple waysthe arteries and veins differ in histological preparations (under a microscope to see).

The outermost adventitia (known) as an external is the layer of connective tissue in the thicker veins than arteries. In large vessels, which can have its own blood supply, as the vasa vasorum (vessels headed "), because oxygen and nutrients, light can not propagate to the outer layers.

The capillaries are of simple squamous endothelium and basement membrane together. This is importnat is needed at the capillary permeability to give properties of oxygen and nutrients exchange. Depending on where the hair on the body, may be more or less permeable.