The Zebrafish in Toxicology/Test

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early to advanced stages1. undifferentiated gonad

Coronal section of a juvenile male zebrafish, total body length 11 mm; age 6w; H&E staining The

undifferentiated gonad

is an elongated structure which diametrically only spans a few cells; the organ is composed of mainly undifferentiated gonocytes. In this image, it is bounded by liver and its associated peritoneal tissue File:Tesdev1per.gif on the medial side, and lateral by mesenchyme . Adjacent to the liver, part of the swim bladder is visible.

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book contents		chapter contents
an interactive version is available here Reproduction Ovary Location, general structure Ovary Development Granulosa cells Oocyte maturation Ovary staging Testis Location, general structure Spermatogenesis Testis Development Miscellaneous Links to related material	→