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blastula

blastula The stage of development of an animal embryo that results from cleavage of a fertilized egg. This stage generally resembles a hollow ball with the dividing cells (blastomeres) of the embryo forming a layer (blastoderm) around a central cavity (blastocoel). In vertebrates the blastula forms a disc (blastodisc) on the surface of the yolk. In mammals the blastula stage is known as a blastocyst. See also gastrula.

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"blastula." A Dictionary of Biology. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"blastula." A Dictionary of Biology. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/blastula-0

"blastula." A Dictionary of Biology. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/blastula-0

blastula

blastula Stage in the development of the embryo in animals. The blastula consists of a hollow cavity (blastocoel) surrounded by one or more spherical layers of cells. Commonly called the ‘hollow ball of cells’ stage, it occurs at or near the end of cleavage and precedes the gastrulation stage.

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"blastula." World Encyclopedia. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"blastula." World Encyclopedia. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/blastula

"blastula." World Encyclopedia. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/blastula

blastula

blas·tu·la / ˈblaschələ/ • n. (pl. -las or -lae / -ˌlē/ ) Embryology an animal embryo at the early stage of development when it is a hollow ball of cells.

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"blastula." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"blastula." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/blastula

"blastula." The Oxford Pocket Dictionary of Current English. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/blastula

blastula

blastula An early embryonic stage of an animal, around the time of cleavage, that usually consists of a hollow sphere of cells. It is formed immediately prior to gastrulation.

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"blastula." A Dictionary of Zoology. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"blastula." A Dictionary of Zoology. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/blastula

"blastula." A Dictionary of Zoology. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/blastula

blastula

blastula (blast-yoo-lă) n. an early stage of the embryonic development of many animals. The equivalent stage in mammals (including humans) is the blastocyst.

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"blastula." A Dictionary of Nursing. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"blastula." A Dictionary of Nursing. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/blastula

"blastula." A Dictionary of Nursing. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/blastula