Question

what is implantion? where does it take place? mention the structure involved and its functions

Answer 1

Implantation is the process by which the zygote attaches to the uterus for development.
It occurs at uterus.
The structure involved is placenta which is a disc shaped tissue with numerous villi.
Its main function is
To transport oxygen and glucose from mother to foetus.
To transport excretary products from baby to mother's blood.

Answer 2

after fertilization the zygote is embedded on the thick lining of uterus is called implantation and after implantation , a disk like tissue originated from the embryo to mother's body
which provides nutrition , respiration & excretion to the embryo.