How the Body Works: The Formation of Lymph

Blood pressure forces a watery fluid from capillary walls into tissue spaces. Most of this fluid reenters the capillaries, while the remainder passes into adjoining lymphatic vessels as lymph. Red cells remain in the blood capillaries and some white cells pass out to act as scavengers. Some materials flow out of the capillaries by way of diffusion, other materials through pores of varying sizes at junctions between capillary cells.

Icyou | June 4, 2008

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