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Blastula in Biological Definition

Blastula

... The blastula is an early stage of embryonic development in ... of cells surrounding a fluid-filled cavity. The blastula follows the morula and precedes the gastrula in the development sequence. A blastula has around 128 cells, with a large central cavity ...

Blastomere

... blastomere is the structure which results from the divisions of a fertilised egg during embryonic development . See also blastocoel blastula morula ...

Developmental biology

... proteins are among the key regulators of morphogenesis. Concepts in developmental biology allantois , amnion , blastocyst , blastomere , blastula , blastulation , chorion , chrysalis , cleavage , ectoderm , embryo , embryogenesis , embryogeny , embryology , endoderm , extra-embryonic ...

Embryo

... advanced stage of development and up until birth or hatching. In humans, this is from the eighth week of gestation . Stages : morula -> blastula -> gastrula . See also Embryogenesis Embryology In vitro fertilization Plant embryogenesis Embryo space colonization ...

Morphogenesis

... forms of tissues , organs and overall body anatomy . In the human embryo, the change from a cluster of nearly identical cells at the blastula stage to a post- gastrulation embryo with structured tissues and organs is controlled by the genetic "program" and can be modified by ...

Gastrula

... The gastrula phase of embryonic development is seen in all animals except the sponges . It follows the blastula phase. The gastrula phase is marked by a dramatic restructuring called gastrulation . After gastrulation is complete, the embryo develops into a ...

Morula

... cell division of the zygote with virtually no growth. The morula is a solid ball; after the 64-cell phase, it develops into a hollow ball, the blastula . ...

Morphogenesis

... forms of tissues , organs and overall body anatomy . In the human embryo, the change from a cluster of nearly identical cells at the blastula stage to a post- gastrulation embryo with structured tissues and organs is controlled by the genetic "program" and can be modified by ...
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