Key Questions

  • Answer:



    I recommend to read Langman's medical embryology books

    It is very hard i admit but it is all about human embryology

    I am going to explain a little..Zygot as you see is cell and you could define it in 2 dimensions but it is not. As soon as it transforms to blastula they have blastocoel from there the embryonic cells of human was separated into 2 layers the trophoblast and cytothropoblast. and so on..

  • Answer:

    Embryogenesis is a developmental process that usually begins once the egg has been fertilised.


    The fertilisation of the egg cell and the sperm cell results in the formation of a single celled zygote. On undergoing mitotic divisions ( cleavage) the zygote further develops into a multicellular embryo.

    In plants, the embryo ( along with other cells from the plant ) develops into the seed that germinates as a new plant. The zygotic embryo is formed following double fertilisation of the ovule. Embryogenesis involves cell growth and division, cell differentiation and programmed cell death.

    Animal embryogenesis involves various stages such as gastrulation, formation of early nervous system and initiation of organogenesis.