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Blastula

Blastulatio: 1, morula; 2, blastula.
Blastocoele et blastodermis.

Blastula (a Graeco βλαστός 'pullus') est cavum sphaerium blastomerorum, cellularum quae interiorem cavum fluido impletum circumdant, blastocoele appellatum, in prima incrementi embryonici statione in animalibus formatum.[1] Incrementum embryonis incipit cum sperma ovum fertilizat ut zygotum fiat, quod multas fissuras subit ut fasciculus cellularum morula appellatus fiat. Blastocoele formata, primus embryo blastula fit, quae formationem gastrulae antecedit, in quo germinales embryonis laminae gignuntur.[2]

Nexus interni

  1. Blastula. 2013 
  2. Gilbert 2010:243–247, 161.

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