Question

Describe the(through the capillary bed). Be sure to include specific names of structures. Check your textbook (pg 712) for information.

Answer 1

• Capillaries are microscopic blood vessels which connect the arterioles with the venules.A network of capillaries is called a capillary bed.The fluid which leak out of the capillaries is called as interstitial fluid. It is this leaked interstitial fluid that bathes your body cells in nutrients.
• Blood flow through the capillary beds is controlled by precapillary sphincters to increase and decrease flow depending on the body's needs.It is directed by nerves and hormones.
• The smallest of the arteries eventually branch into arterioles which in turn branch into a extremely large number of the smallest diameter vessels called the capillaries.It is about ten billion in an average human body.Lymph vessels take fluid that has leaked out of the blood to the lymph nodes where it is cleaned before returning to the heart.
• The blood circulating throughout the capillary beds is not directly in contact with the cellular layers of parenchymal tissues,the fluid movement at each capillary bed depends on the balance of fluid pressures and osmotic pressures.