Blastula vs. Blastocyst

Blastulanoun

(embryology) An early form in the development of an embryo, consisting of a spherical layer of cells filled with fluid; a blastosphere.

Blastulanoun

That stage in the development of the ovum in which the outer cells of the morula become more defined and form the blastoderm.

Blastulanoun

early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs

Blastocystnoun

(biology) The mammalian blastula

Blastocystnoun

The germinal vesicle.

Blastocystnoun

the blastula of mammals

Blastocyst

The blastocyst is a structure formed in the early development of mammals. It possesses an inner cell mass (ICM) which subsequently forms the embryo.