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Q.
Figure shown schematic plan of blood circulation in
humans with labels $A$ to $D$. Identify the label and give its
function’s.
Breathing and Exchange of Gases
Solution:
$A$ is pulmonary vein which takes pure blood from
lungs to heart. $B$ is dorsal aorta which takes pure blood
from heart to various body parts. $C$ is vena cava which
takes impure blood from various body pars to right auricle
of the heart. $D$ is pulmonary artery which takes impure
blood from heart to lungs.
