Chapter 23, Problem 12TYK

Summary Introduction

To analyze: The structure of capillaries and their function in exchanging substances with the surrounding interstitial fluid and the process of exchange inside the capillaries.

Introduction: The exchange of ions, gases and metabolites takes across the membrane of the capillaries through the small pores. These molecules move from the capillaries to the interstitial fluids by the force generated by the blood pressure and the osmotic pressure gradient of the metabolites in the capillaries. The net movement causes the diffusion of the gases, ions and metabolites between the small pores of the capillary wall.