PHSI 208 Lecture Notes - Lecture 17: Extracellular Fluid, Capillary, Blood Proteins
Document Summary
4 main forces influence capillary fluid exchange at the arteriole of the capillary. At arteriole end: capillary blood pressure (bp_ Forces fluid out of the capillaries into the interstitial fluid. Roughly equals to 35 mmhg: interstitial fluid hydrostatic pressure (ifp) Negative if because of the lymphatic vessels constantly drains excess fluid from the tissue spaces back to the blood stream, creating suction effect: plasma-colloid or blood- colloid osmotic pressure (bcop) Encourage fluid move back into the capillaries because plasma has a higher protein concentration than interstitial fluid. Roughly equals to 25 mmhg: interstitial colloid osmotic pressure (icop) Created by the plasma proteins that leak across the capillary wall into the interstitial space. These proteins will return back to the blood stream through lymphatic system. At the arteriole side of the capillary, net filtration pressure (nfp) equals: Forces influence capillary fluid exchange at the venule side of the capillary. At venule end: with a drop in blood pressure.
