The graveyard of $RBC$ is:

The condition of erythroblastosis fetalis occurs only when

How does the $pH$ of blood in arteries compare to that in veins?

$RBCs$ have an average life span of (in $days$)

Mature human $RBCs$ are enucleated. Which of the following is the most appropriate explanation for this?
$(i)$ They do not need to reproduce.
$(ii)$ They are somatic cells.
$(iii)$ They do not perform metabolism.
$(iv)$ Their internal space is available for $O_2$ transport.

Which of the following cells are phagocytic in nature?