There is an interesting article called “Red
blood cells have a unique shape and inner
components that allow them to efficiently
transport oxygen and direct the elimination of
This article mentions that red blood cells
have a unique structure and properties that
allow them to fulfill these crucial missions.
Red blood cells (RBCs) are the primary cells in
human blood. They are biconcave discs, having a
depressed center on both sides. These depressed
centers allow the cells to have more cell
membrane surface which can be exposed to
diffusing oxygen while transiting the lungs.
This structure also allows them to be more
flexible when negotiating tight passages.
If you want to see pictures and learn more,
please click on the next link: