BIOL 205 Chapter Notes - Chapter 26: Glycogen, Trachea, Monosaccharide
7 Dec 2017
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Chapter 26 textbook notes (chapter 21 in old version) Suspension feeders- extract food particles suspended in surrounding water ex. Humpback whale uses baleen for krill, clams, oysters. Substrate feeders- live in/on food source, eat their way through it, caterpillar, moth larvae, Fluid feeders- suck nutrient-rich fluid from living host, aphids, mosquitos, hummingbirds. Bulk-feeders- most species, ingest large pieces of food, may use tenticles, pincers, claws, fangs, jaws, teeth. Digestive compartments- vacuoles (sponges), gastrovascular cavity (flatworms), or alimentary canal (most animals) 4 steps of digestion: ingestion, digestion, absorption, elimination. Digestion- breaking down food molecules, first mechanically (teeth), then chemically (hydrolysis). All animals need proteins, fats, and carbs, but cannot use these materials, only their broken down molecules. Absorption- cells lining digestive tract absorb products of digestion (amino acids and simple sugars), nutrients travel through blood to cells, provide energy or stored as fat. Elimination- undigested material passes out of digestive tract.
