Mass transport - tissue fluid

Question 1

Tissue fluid function

Answer 1

-to supply cells with metabolic materials where capilleries cannot

Question 2

How is tissue fluid formed

Answer 2

-blood in arterial end of capillaries has hydrostatic pressure (H.P.) due to being pumped by the heart
-This H.P. causes tissue fluid to move out of the blood plasma

Question 3

How does tissue fluid return to the capillaries?

Answer 3

-due to fluid lost from capillaries, there is an increased conc. of plasma proteins in the capillary
-this means water potential at venule ( vein) end of capillary lower than water potential of tissue fluid
-so some water capilleriees re-enters at venule end by osmosis

Question 4

What happens to any excess tissue fluid

Answer 4

drained into the lymphatic system