MICROANATOMY

Detailed explanation-1: -The human erythrocyte adopts a distinctive biconcave disc form in vivo. The question as to why the red blood cell should have this particular profile remains unresolved. It has been suggested that this shape maximises the surface area to volume ratio and thus expedites diffusion.

Detailed explanation-2: -The biconcave shape provides a largesurface areacompared to thevolumeof the red blood cell, allowing diffusion to happen efficiently. Adaptations for efficient carriage of oxygen Red blood cells do not contain a nucleus so they can contain more haemoglobin.