Question

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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.
blood

Answer 1

Answer:

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