BIO 126 Lecture Notes - Lecture 4: Gastrovascular Cavity, Storage Organ, Esophagus
6 Apr 2016
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Nutrient- any substance consumed by an animal that is needed for survival, growth, development, tissue repair, or reproduction. To provide energy (to be used when synthesizing atp) Ingestion digestion absorption/ trandportation elimination. Process here may be extensive (herbivores) or not (carnivores) Crop- storage organ dilation of lower esophagus little to no dilation. *birds that eat primarily seeds & grains have larger crops* Smooth muscle allows mixing of food w/ gasmic juice. Pariental cells: secreting & intrinsic function for vitamin b12 absorption. Chief cells: secrete pepsinogen (inactive form of pepsin) Rely on microbes to digest cellulose into monosaccharides. Simple stomach- uses cecum at connection between small & large intestine. Omasum- absorbs some of the water & salts from food. Nearly all digestion of food & absorption of food & water occurs. Capillary- nutrients other than fat absorbed into blood. Lacteal (lymphatic vessel)- allows for larger fat particles to enter. Amino acids & monosaccharides transported through epithelial cells to blood.
