The System: Lymphatic

THE LYMPHATIC SYSTEM FORMATION AND COMPOSITION OF INTERSTITIAL FLUID

Interstitial Fluid • Fluid that surrounds the body cell • Seeps out of from the blood through the walls of capillaries (mainly at their highpressure ends, after they have branched from arterioles) • Through this fluid the exchange of materials between blood capillaries and cell occurs (Example : ?) • Later the fluid will re-enter the capillaries at the venous end (How?)

Interstitial Fluid(2) • 85% of the fluid that leaves the blood at the arterial end re-enters at the venous end. • This must be done to maintain the normal blood volume • What happens to the other 15% that still remains?

Collect excess interstitial fluid from the spaces between the cells and return it to the circulatory Structure system Blind ended Lymph tubes or capillaries Collect lymph closed at one Function end Unite to form Thoraci Right Left c duct arm, subclav Lymphatic shoulder ian vein Receive vessels area, lymph Empties At right side from lymph into intervals of head has and neck Right Left of Right lymphat head, subclav ic duct neck, ian vein chest, left Empties Receive upper lymph into lymph limb, from entire body Function Produce and belowTo ribs Helps defend Lymph nodes stores body against lymphocyte. infection. Lymphatic System