Capillary Exchange Research Paper

- Inner Layer; An inner endothelial cell layer called tunica intima lines the arteries and veins. The tunica intima, is a single layer of squamous epithelial cells that lines the inner surface of the entire cardiovascular system. In many veins, the tunica intima is equipped with pockets that act as one-way valves. These valves prevent the back flow of blood and allow the veins to act as supplemental pumps that help to keep the blood following in one direction, back toward the heart. The activity of the skeletal muscle that surround the veins will create the pressure that derives the venous pump.
2- Functions;
- and oxygen the blood in the capillaries into the interstitial flued and then into the cells. Carbone dioxide and other substances move in the opposite direction from the cells into the capillaries. Fluid is also exchanged between capillary blood and interstitial fluid. Two opposite forces influence capillary exchange. These are the osmoses and filtration and these forces vary depend on the location. At the arterial end of a capillary, the outwardly directed forces are dominant and tend to move fluids from blood into tissue. At the venous end of the capillary the inwardly directed forces are greater and thus tend to move fluid from tissue to blood.

- Veins and Venules; The main function of veins is to …show more content…
From the left ventricle, the blood is pushed into the aorta and flow into arteries that carry it into the tissues and organs of the boy. The blood move from arteries to arterioles to capillaries of systemic tissues where the vital two-way exchange of substances occurs between blood and cells. Next the blood will flow out of each organ capillary beds by way of its venules and then veins to drain eventually into the inferior or superior vena cava, and through these two great veins into the right