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Open/Closed Circulation & Blood Vessels | A-level Biology | OCR, AQA, EDEXCEL

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This program from VEA explores the need for multicellular animals to have specialised internal transport systems. Following veterinary experts, we get an exclusive insight into the day-to-day activities of domestic animal health.

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pressure flitration-at start of capillary bed, by arteries. the hydrostatic pressure in capillaries is higher than in fluid. this forces fluid out of the capillaries forming tissue fluid. as fluid leaves the pressure reduces and so is lower at the end near to veins.