Question
) Fig. 2.3 shows blood returning to the heart at low pressure through a vein in a leg.
E
direction
of blood
flow back
to heart
Fig. 2.3
Name part D in Fig. 2.3.
Explain how this part enables blood to return to the heart.
(i)
name of part D.
function
Answer
Part D is a vein. Veins are blood vessels that allow blood to flow back to the heart at low pressure, enabling the heart to pump oxygenated blood throughout the body.