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Blastula in Biological Dictionary

Gastrula

... hollow, single-layered ball of cells called a blastula which itself is the product of the repeated ... ... The gastrula develops from the blastula by invagination (inpocketing), forming ... ... zebrafish embryos by transplantation at the blastula or gastrula stage. ... chimera, zebrafish ...

Blastula

... The blastula , meaning "sprout") is an early stage ... in the animal pole of the embryo. The blastula follows the morula and precedes ... blastula n. , pl. -las or -lae ( ). An early embryonic ...

Blastoderm

... at Britannica. Assorted References formation by blastula ( in blastula (biology) ) ... of cells, or blastomeres, ... of a fertilized egg. The cells of the blastula form an epithelial (covering) layer, called .....

Blastocoel

... at Britannica. Assorted References formation by blastula ( in blastula (biology) ) ... development of an embryo by ... of a fertilized egg. The cells of the blastula form an epithelial (covering) layer, called the ...

Yolk plug

... of the ventral lip of the blastopore. It is a patch of large endodermal cells which remains exposed on the vegetal surface of the amphibian blastula that will eventually be internalized by epiboly. Frog yolk plug . This embryo is near the end of gastrulation. ... overlying the ...

Primitive streak

... of gastrulation is complete the primitive streak disappears. ... The primitive gut that forms during gastrulation in the developing blastula is ... blastopore in amphibians and fish, and the primitive streak in birds and mammals. ... Britannica online encyclopedia article on ...

Morula

... in a solid ball contained within the zona pellucida. morula n. , pl. -lae ( ). The spherical embryonic mass of blastomeres formed before the blastula and resulting from cleavage of the fertilized ovum CE SITE EN CONSTRUCTION AGRÈGE PLUSIEURS SOUS-SITES, TOTALEMENT INDÉPENDANTS LES ... ILS ...

Germinal disc

... about germinal disc in the free online ... germinal disc . Also found in: ... germinal disc - a layer of cells on the inside of the blastula ... Germinal disc - Wikipedia, the free encyclopedia ... Eggs From A To Z - Germinal Disc ... germinal disk : Definition from ...

Gastrulation

... ... 3. Mammals - gastrulation similar to birds and reptiles, even though eggs possess little yolk. ... AMPHIOXUS GASTRULATION . A. Wall of blastula flattens and ... In the simplest terms, gastrulation is a stage in early development; in human ... Do all amniotes go through gastrulation ...

Blastocyst

... ... Note: click on a word meaning below to see its connections and related words. The noun blastocyst has one meaning: Meaning #1 : the blastula of Blastocyst transfer increases success rates and lowers the chances of multiple births. ... Blastocyst Transfer ... A blastocyst is an ...

Archenteron

... The primitive gut that forms during gastrulation in the developing blastula is known as the archenteron . It develops into the digestive tract of an animal. Third, secondary mesenchyme pull the tip of the archenteron ...

Animal

... Animals have several characteristics that set them apart from other living things. ... In most animals , embryos pass through a blastula stage, which is a ... Explore the animal world. Find sites about amphibians, birds, fish, insects, mammals, reptiles, and other species. In ...
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