Question

If the nucleus is present in the red blood cells then what happens?

Answer 1

RBCs are designed in such a way that they have to carry oxygen in the bound form with hemoglobin. Nucleus occupies adequate space in the cell. So, RBCs do not have nucleus because they can accommodate more hemoglobin to carry oxygen. If nucleus would be present in the RBCs, they could not accommodate sufficient amount of hemoglobin for the transport of oxygen. Tissues would be deprived of adequate amount of oxygen leading to serious complications.