ANP 1105 Lecture Notes - Lecture 10: Cough Reflex, Epiglottis, Adrenal Gland

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1105
• Professor: Joanna Komorowski

Document Summary

The respitory system: the epiglois part of the larynx covers the laryngeal inlet during swallowing to keep food out of the lower respiratory passages. Alveolar macrophages wander freely, ingesing and destroying invading microorganisms or foreign mater: simple squamous epithelium forms the walls of the alveoli. Squamous epithelia are thin and easily passed by respiratory gases. The membrane is also kept thin by organizing the squamous cells in a single layer: bronchial arteries are blood vessels that supply oxygenated systemic blood to the lung issue. The bronchial arteries, which usually originate in the thoracic aorta, supply oxygenated blood to the lung issue: the epiglois prevents food and liquids from entering the trachea. When swallowing, the epiglois covers the laryngeal inlet. This keeps food and liquids from entering the lower respiratory passages: during pleurisy, the inlamed parietal pleura of one lung rubs against the inlamed visceral pleura of the same lung.