Anatomy and Physiology Homework?

All exchanges to and from the blood and tissue cells occur through the (1).
interstitial fluid is the fluid that surround blood and tissue. Things go through the interstitial fluid between blood and tissue.

 Generally speaking, substances tend to move according to their concentration gardients by the process of (2).
diffusion. High concentration of solutes to lower concentration of solutes.

Substances that are (3) pass directly through the plasma membranes of the capillary endothelial cells; other substances pass by means of or via (4) (5) or (6).
Plasma membrane is made of lipids. Fat soluble substances can just go through the plasma membrane. However, other substances need some help to get into the cell. Vesciles are like little pocket that take substance in or out of the cells. Fenestrations are holes.

 The most permeable capillaries are those exhibiting (7).
capillary clefts

 Capillaries that have (8) and (9) tend to be leaky and two forces acting at capillary beds cause fluid flows.
hydrostatic pressure is the force of the fluid caused by the heart pump. osmotic pressure is caused by the proteins in the blood. Both hydrostatic pressure and osmotic pressure are involved in fluid flows.

 The pressure that forces fluid out of the capillaries is (10) and the force that causes fluid to reenter the blood is (11).
hydrostatic and osmotic

Hence fluid is forced into the (12) at the arteriole end of the bed and into the (13) at the venule end of the Capillary bed.
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