It allows the red blood cell to contain more haemoglobin (and, therefore, carry more oxygen molecules). It also allows the cell to have its distinctive bi-concave shape which aids diffusion - this shape would not be possible if the cell had a nucleus in the way.

Hey yash...... Before answer we should know two things…

●One is that red blood cells(erythrocytes) are cells that are used as oxygen supplying vehicles…from pulmonary system to each tissue

●Second it is performed so justifically that no cell is that is deprived of oxygen…and this is due to very extensive pipeline network of capillaries…

■There are so small capplilaries in the body that from which red cell passed by being folded…as it is biconcave in shape…

■That is the reason…that erythrocytes are enucleated because initially they possess nucleus but when they enter blood nucleus is removed.because due large genome more space is occupied by nuclei.

☆☆☆Hope this help you…..so ifu like then plzz upvote ☆☆and enjoy ur study withedurev and with me.

In the bone marrow when red blood cells (RBCs) are produced, they contain the nucleus.During a process known as enucleation (which essentially means removal of a specific mass without any physical manipulation such as dissection) takes place which essentially removes the nucleus from the cell. Since the sole purpose of RBC is transportation of oxygen, a presence of nucleus is not really important.