Blood pressure in the pulmonary artery is [2016]
more than that in the pulmonary vein
less than that in the venae cavae
same as that in the aorta
more than that in the carotid
In mammals, which blood vessel would normally carry largest amount of urea? [2016]
Hepatic vein
Hepatic portal vein
Renal vein
Dorsal aorta
(1)
Hepatic vein carries largest amount of urea. Urea is produced in liver. Hepatic vein transports liver’s deoxygenated blood to heart for oxygenation.
Which one of the following animals has two separate circulatory pathways? [2015]
Whale
Shark
Frog
Lizard
(1)
Whale is a mammal and in mammals, two separate circulatory pathways are found — systemic circulation and pulmonary circulation. Oxygenated and deoxygenated bloods received by the left and right atria respectively pass on to the left and right ventricles. Thus, oxygenated and deoxygenated bloods are not mixed. This is referred to as double circulation.
