| Front | Explain how tissue fluid is formed and how it may be returned to the circulatory system. ( 6 marks) |
|---|---|
| Back | 1. (hydrostatic) pressure of blood high at arterial end; 2. fluid/water/soluble molecules pass out (reject plasma); 3. proteins/large molecules remain; 4. this lowers the water potential / water potential becomes more negative; 5. water moves back into venous end of capillary (reject tissue fluid); 6. by osmosis / diffusion; 7. lymph system collects any excess tissue fluid; 8. (lymph) returns to blood / circulatory system / link with vena cava/ returns tissue fluid to vein; |
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