This diagram shows a sagittal section of a Rotifer. b, brain; bl., excretory bladder; c, cloaca, the common opening of digestive and reproductive organs; co, caelom; e, eyespot; ex, excretory canal; f, flame cells; f.g., foot gland; ft., foot; g, gut; m, mouth; m.f., longitudinal muscle fibres; mx, mastax; o, ovary; pf., pharynx; s.g., salivary gland; t, tentacle; tr, trochus, or cilia-bearing disc.

Rotifer

This diagram shows a sagittal section of a Rotifer. b, brain; bl., excretory bladder; c, cloaca, the…