BIOL 371 Lecture Notes - Lecture 15: Seta, Ecdysis, Clitellum
Document Summary
Live in u shaped tubes in the sand. Lay in the tube, beat parapodia to draw water in 1 end, and out through the other. Mas a mucus bag in which the water flows through and food particles get trapped in the mucus as the water flows through. When the bag gets full enough the worm rolls it into a ball and swallows it. Eversible pharynx that shot out to grab prey. Well defined heads with sensory organs to detech prey. Eyes maybe simple or as complex as cephalopod. For anchoring in a tube if they live in a tube. Separate sexes and release gametes into the water. Grow larger eyes during breeding season and become epitoke. At dawn and at dusk they swim to the surface of the water, and swim around each other. They bud off the multisegmented epitoke, which is the back end, they have parapodia for swimming and eyespot.
