RectFIG 2: Intestinal-rectal valve and the rectal gland.

A. The valve creates a narrow passage for the intestinal contents to be expelled into the rectum. Epifluorescent image from a transgenic animal expressing a GFP reporter gene in the valve cells. (Strain source: Z-W. Wang and B. Chen.) Magnification, 400x.
B. DIC image of the same animal as in A. Seen is the nucleus of virL, left lateral view. Magnification, 600x.
C. Three rectal gland cells (rect_D, rect_VR and rect_VL) make a ring around the valve. Epifluorescent image from a transgenic animal expressing a GFP reporter gene in the gland cells, left lateral view. (Strain source: M Land and C. Rubin.) Magnification, 400x.
D. Gland cells in dorsal view, abutting the intestine. Epifluorescent image; same strain as in C. Magnification, 400x.

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