How are red blood cells adapted for transport of oxygen?

Red blood cells are highly adapted to be efficient at absorbing and storing oxygen to carry around the body to be used for aerobic respiration. There are three main adaptations;Biconcave shape - this maximises the surface area for oxygen absorption Thin cell membranes - so that oxygen diffuses quickly and can reach the centre of the cell efficiently No nucleus - to maximise space in the cell for haemoglobin