Term Name:	immature thymic epithelium
Synonyms:
Definition:	Epithelium of the thymus primordium composed of cells of immature morphology. The immature thymic epithelium is continuous with the pharyngeal epithelium. The immature thymic epithelium is composed of electron-lucent epithelial cells of irregular or polygonal shape and contain numerous ribosomes, large electron-lucent mitochondria, and rough endoplasmic reticulum. Nascent desmosomes join these primitive epithelial cells together.
Appears at:	Hatching:Pec-fin (60.0h-72.0h)
Evident until:	Larval:Protruding-mouth (72.0h-96.0h, 3.5mm)
Ontology:	Anatomy Ontology [ZFA:0005780]

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