Each of statements A to E describe a structure associated with the mammalian heart. For each statement, identify the structure that is being described.
A The chamber that pumps blood into the pulmonary artery.
B A blood vessel that transports deoxygenated blood into the right atrium.
C The specialised tissue responsible for delaying the conduction of impulses from the atria to the ventricles.
D The blood vessels that supply cardiac muscle with oxygenated blood.
E The valve that prevents the backflow of blood from the ventricle that contains oxygenated blood.
