The process of embryogenesis begins when an egg or ovum is fertilized by a sperm cell to form a zygote. This zygote then undergoes mitotic division, a process that does not result in any significant ...

In zebrafish, as in mammals, hematopoiesis occurs in two waves. The 'primitive' wave produces erythrocytes and myeloid cells; the latter differentiate in the yolk sac and then invade the embryonic ...