25. What is vena cava? Which
type of blood circulates within
the venacava?

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The vena cava either of two
veins that debouch the right atrium.
superior vena cava all blood
that from the head, superior
limbs, the and the superior
of the trunk. inferior vena cava
blood drained from inferior
portion of trunk and the
limbs.

Venous blood within the vena
.