HSCI 100 Lecture Notes - Lecture 1: Streptococcal Pharyngitis, Rheumatic Fever, Tonsillitis

• School: Simon Fraser University
• Department: Health Sciences
• Course: HSCI 100
• Professor: Nienke Van Houten

Document Summary

Traffic crossing: the air and food pipes overlap. When you swallow, the larynx (voicebox) moves up against the epiglottis to close off the opening to the trachea. Just feel your adam"s apple move when you swallow. A tube, often called the windpipe, that connects the larynx with the 1 degree bronchi. Made of connective tissue, smooth muscle and c-shaped cartilaginous rings. Lined with cilia and mucus that help to keep the lungs clean. The bronchi, bronchioles and alveoli beyond the 1 degree bronchi make up the lungs. The right lung has 3 lobes while the left lung has 2 lobes. Each lung is enclosed by membranes called pleura, the pleura help keep lungs expanded. Inspiration/inhalation an active process involving muscle contraction that brings air into the lungs. 1: expiration/exhalation usually a passive process where muscles relax and expel air from the lungs. The diaphragm flattens and the rib cage moves upward and outward.