BIOB34H3 Lecture Notes - Lecture 4: Radula, Suction Cup, Aphid
Document Summary
Feeding methods: deposit feeders: deposit feeders ingest food items from solid material that they live on such as snails. Snails use their radula to scrape the surface of glass looking for any material that would be on it. This is also where new radula are made as radula can wear out over time. On the radula, we can find teeth and snails can modify these teeth depending on the snails diet. Feeding methods: suspension (filter) feeders: suspension feeders ingest organic materials suspended in the water or air such as sponges. The choanocyte generates a water current and the water goes into the phorocytes (holes) in the sponge. Here we can find mucus secreted to trap food particles. As food particles get trapped in the mucus, phagocytosis occurs to take in the trapped food. The food is then transported to the amoebocyte to get digested: the largest known animal that filter feeds is the baleen whale.
