The blastocyst represents blastula stage in mammals during the embryonic development. After fertilization, the formed zygote undergoes rapid cell division known as cleavage.
After cleavage the group of approximately 100 cells is produced. This is known as blastula, spherical layer of cells around a fluid filled cavity which is known as blastocoel.
In mammals, this stage of embryonic development is known as blastocyst.
Blastocyst . Why ? Because Each of those cells will eventually become a different part of the baby's body as they each multiply, creating muscle, bone, and organ tissues.
air temperature, air pressure, humidity of the air, amount and kind of cloud cover, amount and kind of precipitation, and speed and direction of the wind.
