HUBS192 Lecture Notes - Lecture 24: Stratified Squamous Epithelium, Pylorus, Peritoneum

• School: University of Otago
• Department: Human Body Systems
• Course: HUBS192
• Professor: Greg Jones

Document Summary

Food will need to fit into stomach; stomach is located high in abdominal cavity; under liver; under diaphragm. Eat a large meal, you feel a distension of abdominal wall; it will expand. Oesophagus: lined with squamous epithelium; won"t secrete acid/enzyme (for digestion); thus we need to change the epithelium stomach; we want a lot more mechanical movement (pummelling); will modify muscle layer; Storage: since we don"t take very small amounts continually during the day. Need a system where lumen can expand, and keep it in there (need sphincters) Need a structure that at rest/non-filled: folded; able for distension; folded submucosa. Mechanical digestion: add another muscle layer (in oblique orientation; now muscle in every direction possible. Sphincters (smooth muscle innervated); control opening to allow the movement of material into small intestine at appropriate times. More distended than a tube, tucked under liver; right under diaphragm; left hand side next to spleen.