ReproFIG 2: Precursor cells that give rise to the reproductive system.
Schematic of an L1 hermaphrodite midbody region. Shown are the precursors (blast cells) that give rise to the reproductive tissues in the adult. Precursors are colored according to the adult tissues to which they will give rise. HSNL/R neurons are already generated at this time. The gonadal primordium containing Z1–Z4 straddles the ventral midline and is separated from other tissues by a gonadal basal lamina (orange). At hatching, assignment of P3, P4, P5, P6, P7, and P8 fates among the Pn cells has not yet occurred, so at this stage the cells are referred to as P3,4L, P3,4R, P5,6L, P5,6R, P7/8L, and P7/8R. (Based on Sulston and Horvitz, 1977; Kimble and Hirsh, 1979; Sulston et al., 1983; see also Epithelial System - Hypodermis.)
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