BIOL 212 Study Guide - Final Guide: Muscular Layer, Tunica Externa, Stratified Squamous Epithelium
Document Summary
Lecture 1 - (end of respiratory) & digestive. Medulla oblongata and pons is the respiratory center. Ribs goes out laterally; diaphragm moves inferiorly (intrinsic muscles) Deep breathe recruits extrinsic muscles: diaphragm, external intercostals contract, thoracic cavity volume increases (pressure drops, lung surface pulled out and down, alveolar pressure drops below. Segmentation = mixing food + fluid w/in digestive tract. No movement, but contraction of muscle to break down. Propulsion - moving food through the digestive tract (towards the anus) Chemical digestion - breakdown food by chemical reactions (enzymes) Occurs in mouth, stomach, intestines (carbohydrates // protein // lipids) Absorption - movements of particles into blood. Most nutrient absorption occurs in small intestines (jejunum ?) Oral cavity (teeth/salivary gland) oropharynx to laryngopharynx esophagus. Stomach (gastric gland) small intestines (know the segments; liver, gallbladder, pancreasbrush border enzymes: attached to apical surface of small intestine wall) large intestine (ascending, descending, sig . look these 4 segments up) rectum anus.
