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The diagram given below are cross sections of blood vessels :(i) Identify the blood vessels A, B and C. (ii) Name the parts labelled 1 to 3. (iii) Name the type of blood that flows through A.(iv) Mention one structural difference between A and B. (v) In which of the above vessels does exchange of gases actually take place ? |
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Answer» (i) (A) Artery (B) Vein (C) Capillary (ii) 1- Tunica externa/connective tissue layer 2- Lumen 3- Tunica media/Muscular layer (iii) Oxygenated blood flows through A. (iv) Arteries are thick walled and veins are thin walled. (v) The exchange of gases takes place in C (capillaries). |
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