BIOL 121 Lecture Notes - Lecture 19: Coelom, Hydrostatic Skeleton, Motility

• School: U of S
• Department: Biology
• Course: BIOL 121
• Professor: Jeff Sereda& Mike Pollock

Document Summary

Aquatic freshwater lakes and streams in. Chemoheterotrophic scavenger or predator on small invertebrates in water. Cephalization concentration of nervous tissue in head region, sensory structure in head (auricles sensitive to touch and chemicals, eyespots sensitive to light) Hydrostatic skeleton fluid portion inside body (in mesoderm) is completely sealed from outside environment. Motile muscle contraction and use of cilia along ventral surface. Sexual gametic life cycle, mobile sperm swim to another flatworm, many hermaphrodites, usually cross-fertilize. Taenia tapeworm vertebrate parasite, found in intestines.