Tissue fluid is formed by high hydrostatic pressure at the arterial end of capillaries forcing fluid out, leaving proteins behind which lowers the water potential, causing water to return by osmosis. Excess fluid is collected and returned to the circulatory system via the lymph system.
Tissue fluid is formed by high hydrostatic pressure at the arterial end of capillaries forcing fluid out, leaving proteins behind which lowers the water potential, causing water to return by osmosis. Excess fluid is collected and returned to the circulatory system via the lymph system.
| 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; |
Learn with these flashcards. Click next, previous, or up to navigate to more flashcards for this subject.
Next card: Type blood vessel elastic tissue wall mark artery
Previous card: Air oxygen enters abdominal pumping increases efficiency gas
Up to card list: AQA Biology Flashcards