CSB346H1 Study Guide - Final Guide: Dorsal Respiratory Group, Respiratory Center, Ventral Respiratory Group
16 Apr 2016
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Document Summary
Respiratory anatomy: characterized by their rhythmic firing patterns that usually correlate with inspiration or expiration. Pressure in the sac is the lowest (compared to atmosphere and lungs) and this provides a pressure gradient that pulls on the lungs to open them. Can be traumatic or spontaneously (ex: emphysema decreasing the size of your lungs such that they don"t touch the pleural sac anymore) caused: lungs: large sacs that are the passive sight of gas exchange for the body. Intercostals (i and e): these muscles found on the ribs can either help get air in or out of the lungs. The external intercostal muscles are inspiratory and the main ones active at rest. When these contract, they pull the rib cage and increase thoracic volume. Our blood"s hb is saturated at rest so we don"t absorb all 882 ml: oxygen carrying capacity: when hb is fully saturated, 1g of hb carries about 1. 34ml of oxygen.
