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Question : Consider the following statements?(a) Before birth, foramen ovale allows the blood to pass from right atrium to left atrium , thus bypassing the pulmonary circulation, (b) Heart is protected by a double walled pericardium , (c) The muscle fibres present in heart are different from smooth muscles in being mesodermal in origin , (d) Nodal tissues like AVN, SAN are specialised neural tissues which are distributed in heart.How many among the statements mentioned above are correct? |
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Answer» Two |
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