BIOB34H3 Lecture Notes - Lecture 19: Radula, Filter Feeder, Choanocyte
Document Summary
Eg. gastropods snails structure in snails mouth is called radula scrapes the glass wall (aquarium) eats the algae chitinous teeth . Shovel the mud into their mouth and tries to separate the nutrients they need. * suspension feeding also called filter feeding ingestion of organic material suspended in water (or air) acquire nutrients by filtering nutrients from water or air which they live. Eg . sponges has osculum and phorocytes used for ventilation and food intake. Two cell types that are particularly involved in feeding: choanocyte actively draw water to sponges body appear to have a collar on them serves as filter. Choanocytes secretes mucus that covers the collar and as water floating through the collar, mucus will trap the organic maters. Once the food is captured, the collar starts to shrink back into the cell phagocytosis occurs, choanocytes ingests the food and passes it to amoebocytes: amoebocyte digests the food particles.
