Subject :NSO Class : Class 7
Study the given differences between two blood vessels.
Identify X and Y and select the correct option.
A Walls of X are permeable to gases and other
substances whereas walls of Y are impermeable
to gases and other substances.
B X carries deoxygenated blood except pulmonary
vein whereas Y carries oxygenated blood except
the pulmonary artery.
C A series of valves are present in Y which help to
prevent back flow and allow blood to flow only
towards the heart.
D All of these.