GermFIG 2: Germ cells.

A. TEM, transverse section, of an adult hermaphrodite at low magnification with color overlay to indicate tissue domains. The distal portion of the gonad (dorsal) consists of thin gonadal sheath cells surrounding a syncytium of germ cells that are attached to a central cytoplasmic core (the rachis). The proximal region of the gonad (ventral) consists of a thicker gonadal sheath surrounding a female gamete, the oocyte. (GBL) Gonadal basal lamina. (Image source: N533 [Hall] F560.)
B. TEM, longitudinal section, of adult germ line from the distal region of the gonad, viewed at high magnification. (Image source: N506 [Hall] F672.)

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