BIOL-1116 Lecture Notes - Lecture 6: Polychaete, Myriapoda, Lepidoptera
17 Mar 2017
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Chapter 33: describe how a sponge feeds and digests its food. They are suspension feeders, so they capture food particles suspended in the water that pass through their body. The choanocytes (flagellated collar cells) generate a water current through the sponge and ingest the suspended food. Amoebocytes are found in the mesohyl (noncellular layer between two layers) of the sponge and they play roles in digestion and structure: list the characteristics of the phylum cnidaria that distinguish it from other animal phyla. Have a simple diploblastic and radial body plan. The cells help to sting the prey: list the characteristics of platyhelminthes. Live in marine, freshwater, and damp terrestrial environments. Protonephridia regulate the osmotic balance: describe a lophophore and name two lophophorate phyla. A lophophore is a horseshoe-shaped, suspension-feeding organ with ciliated tentacles. Two phyla include: ectoprocta and brachiopoda: describe the features of molluscs and distinguish among the four classes. Marine, some are freshwater and some terrestrial.
