the morula develops into a hollow, fluid-filled ball of cells called a blastocyst.
a hollow ball of cells. novaNET
a hollow ball of cells. novaNET
the hollow ball of cells is called the Blastocyst. At which point this occurs depends on the particular species.
When an embryo (fertilized egg) reaches the uterus, it is a hollow ball of about 100 cells called a blastocyst.
blastula
Both are a hollow ball of cells
1000-3000 cells arranged as a hollow ball
it is called a blastocyst
The developmental stage in which the embryonic cells form a hollow sphere (actually its full of fluid) is called a blastula.
A hollow ball.....
Hollow point bullets literally have a hollow point, and ball ammo does not.