control blood flow to local capillary bed

• permits exchange of water and solutes between blood and interstitial fluid (fluid surrounding tissue)

NaCl

water

urea

Starling equation

movement of fluid back into blood vessel

Role of lymphatic system in vascular system

Filtration tends to occur on what end of the capillary? what end does absorption occur?

• filtration favored at arteriole end of capillary
• absorption favored at venous end of capillary

Average arterial value of hydrostatic pressure? Average venous value of hydrostatic pressure?

• arteriole = 35 mm Hg
• venous = 20 mm Hg

• increase in filtration (no more net absorption at the venous end)

• standing for a long timne
  • pressure in my toes keeps building up, leading to more filtration, causing edema in the toes 
• congestive heart failure
• pregnancy
  • fetus puts pressure on veins, leading to more filtration, leading to more edema

• increases proteins in interstitial compartment (increase interstitial oncotic pressure), leading to increases in net oncotic pressure
• this cause increases in filtration

• decrease capillary oncotic pressure (less force for absorption)
• causes filitration increase

Effect of increase of plasma protein concentration

• increase capillary oncotic pressure, leading to increase in absorption