Leech Section

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“Transverse section of leech. c., Cuticle; e., epidermis; c.m., dermis and outer muscles (circular and oblique); l.m., longitudinal muscles (the peculiar connective tissue is hardly indicated); r.m., radial muscles; l.v., lateral blood vessel; d.s., dorsal sinus; v.s., ventral sinus enclosing nerve-cord (n.); g., median part of crop, with lateral pockets (p.); t., testis; f., nephridial funnels; v.d., vas deferens.” -Thomson, 1916




J. Arthur Thomson, M.A., LL.D. Outlines of Zoology (New York, NY: D. Appleton & Company, 1916)


TIFF (full resolution)

2400×1619, 994.4 KiB

Large GIF

1024×690, 173.7 KiB

Medium GIF

640×431, 85.9 KiB

Small GIF

320×215, 27.1 KiB