BIOL 2030 Study Guide - Quiz Guide: Peristalsis, Oviduct, Chordate
14 Mar 2017
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Mesenteries running from organ to organ are usually of the organs. called ligaments. Digestive system: the food when swallowed by the mouth travels down the tubular esophagus, which lies dorsal to the larynx. Food is moved down by peristalsis: esophagus ends at the cardiac sphincter, the j-shaped stomach ends at the pyloric sphincter. Large intestine leads to a muscular rectum hidden under the pelvic girdle. It opens at the anus, controlled by sphincter muscles, at the base of the tail. Anatomical terms: cranial- toward the head, caudal- toward the rear, dorsal- toward the spinal cord (back, ventral- toward the belly, medial- toward the middle, distal- away from. External features: external nares- these are a pair of openings (nostrils) on each side of the head, cranial from the eyes. Water is taken into the smaller of the two openings and expelled through the larger opening.
