KINESIOL 1Y03 Study Guide - Quiz Guide: Bronchus, Endodermic Evagination, Extracellular Matrix

• School: McMaster University
• Department: Kinesiology
• Course: KINESIOL 1Y03
• Professor: Krista Howarth

Document Summary

Lungs begin as a single mid-line evagination of the foregut. Tracheal bud will become the tube that runs parallel to the esophagus that carries air. Start with single tube & get branches that will branch furtherwtc. Run from the trachea to the lungs. Branching of bronchi continues for 17 generations in fetus and up to 24 generations in the. Trachea branched into primary bronchi; right & left primary bronchus. Also have the next generation of bronchi; left secondary bronchus and right secondary bronchus. Right tertiary bronchus and left tertiary bronchus. Starting to see lungs of fully formed fetus. Bronchi starting to develop into lobes of the lungs. Left side has only two lobes b/c needs space to accommodate for the heart. In fully developed fetus & adult; 3 lobes on right and 2 lobes on left. Left: superior & inferior lobe (no middle) Developing serous membrane that surrounds the lungs (pleural membrane)