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What are the types of blood vascular system ? |
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Answer» Types of blood vascular system : Open circulatory system – The main blood vessels arising from the heart pour the blood into tissue spaces called sinuses. The blood comes in direct contact with the tissue cells thus exchanging respiratory gases, food materials and waste products directly between blood and tissue cells. -Blood flows slowly through the open sinuses because of lack of enough blood pressure. -Respiratory pigment, if any, is dissolved in blood plasma and red corpuscles are absent. -Found in some arthropods and most molluscs. Haemolymph – No distinction between blood and tissue fluid in animals with open circulatory system. Hence, blood / body fluid is appropriately called haemolymph. Closed circulatory system –blood remains in blood vessels while circulating through the body and never comes in direct contact with the tissue cells. -Blood is distinct from the body fluid. |
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