KCSE NOTES REVISED EDITION

Adaptation of the capillaries to its function

1. Numerous to increase surface area through which materials diffuse;
2. Thin/one-cell thick/single cell epithelium/endothelium for faster diffusion;
3.  Lined with a single cell epithelium for faster diffusion;
4.  Are selectively permeable for passage of materials;
5.  Narrow lumen to maintain pressure;