MICROANATOMY

Detailed explanation-1: -In humans, as in all mammals, the mature RBC lacks a nucleus. This allows the cell more room to store hemoglobin, the oxygen-binding protein, enabling the RBC to transport more oxygen. RBCs are also biconcave in shape; this shape increases their surface area for the diffusion of oxygen across their surfaces.

Detailed explanation-2: -In mammals, when RBCs mature, they get enucleated. Thus, mature RBCs/erythrocytes lack nuclei which makes them biconcave. It helps them to accommodate more haemoglobin and transport more amount of oxygen.

Detailed explanation-3: -The mature human red blood cell is small, round, and biconcave; it appears dumbbell-shaped in profile. The cell is flexible and assumes a bell shape as it passes through extremely small blood vessels.

Detailed explanation-4: -Mature human red blood cells (erythrocytes) are highly specialized and terminally differentiated cells that lack normal cell organelles such as a nucleus, endoplasmic reticulum and mitochondria.

Detailed explanation-5: -Red blood cells do not have nuclei, allowing for more room for hemoglobin. The shape of red blood cells is a unique biconcave shape (round with a flat, indented center). Their lack of nuclei makes them so flexible that they can pass through extremely small blood vessels.