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The blastula (from Greek ß?ast?? (blastos), meaning "sprout") is an early stage of embryo
Embryo

An embryo is a multicellular organism ploidy eukaryote in its earliest stage of development, from the time of first cell division until birth, Egg , or germination....
nic development in animal
Animal

Animals are a major group of multicellular, eukaryotic organisms of the Kingdom Animalia or Metazoa. Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their life....
s. It is also called blastosphere. It is produced by cleavage of a fertilized ovum
Ovum

An ovum is a haploid female reproductive cell or gamete. Both animals and embryophytes have ova. The term ovule is used for the young ovum of an animal, as well as the plant structure that carries the female gametophyte and egg cell and develops into a seed after fertilization....
 and consists of a spherical layer of around 128 cells surrounding a central fluid-filled cavity called the blastocoel. The blastula follows the morula
Morula

A morula is an embryo at an early stage of embryonic development, consisting of Cell in a solid ball contained within the zona pellucida....
 and precedes the gastrula in the developmental sequence.

class="link1" onMouseover='showByLink("m1026554",this)' onMouseout='hide("m1026554")'href="http://www.absoluteastronomy.com/topics/Whitefish">whitefish
Whitefish

Whitefish or white fish may refer to:In fishing terminology:* Whitefish , a fisheries term referring to the flesh of many types of fish...
 blastula is often used to help study the processes of mitosis in animal cells.






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The blastula (from Greek ß?ast?? (blastos), meaning "sprout") is an early stage of embryo
Embryo

An embryo is a multicellular organism ploidy eukaryote in its earliest stage of development, from the time of first cell division until birth, Egg , or germination....
nic development in animal
Animal

Animals are a major group of multicellular, eukaryotic organisms of the Kingdom Animalia or Metazoa. Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their life....
s. It is also called blastosphere. It is produced by cleavage of a fertilized ovum
Ovum

An ovum is a haploid female reproductive cell or gamete. Both animals and embryophytes have ova. The term ovule is used for the young ovum of an animal, as well as the plant structure that carries the female gametophyte and egg cell and develops into a seed after fertilization....
 and consists of a spherical layer of around 128 cells surrounding a central fluid-filled cavity called the blastocoel. The blastula follows the morula
Morula

A morula is an embryo at an early stage of embryonic development, consisting of Cell in a solid ball contained within the zona pellucida....
 and precedes the gastrula in the developmental sequence.

Research

A whitefish
Whitefish

Whitefish or white fish may refer to:In fishing terminology:* Whitefish , a fisheries term referring to the flesh of many types of fish...
 blastula is often used to help study the processes of mitosis in animal cells. The blastula is prevented from multiplying during the nuclear-injection stage.

Blastula and blastocyst

In mammal
Mammal

Mammals are a class of vertebrate animals whose name is derived from their distinctive feature, mammary glands, with which they feed their young....
s, blastulation leads to the formation of the blastocyst
Blastocyst

The blastocyst is the structure formed in early embryogenesis, after the formation of the blastocoel, but before implantation.It possesses an inner cell mass, or inner cell mass which subsequently forms the embryo proper, and an outer layer of cells, or trophoblast which later forms the placenta....
, which must not be confused with the blastula; even though they are similar in structure, their cells have different fates.