HSCI 100 Lecture Notes - Lecture 10: Medulla Oblongata, Intercostal Muscle, Thoracic Cavity
20 Apr 2016
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Document Summary
Breathing moves air in and out of the lungs. External respiration is the exchange of oxygen and carbon dioxide between the lungs and the blood. Gas transport moves oxygen and carbon dioxide between the lungs and the body tissues. Internal respiration is the exchange of oxygen and carbon dioxide between blood and the body tissues. Nose or mouth, trachea, bronchus, bronchioles, alveolus in lungs (blood capillary) 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. The trachea: a tube, often called the windpipe, that connects the larynx with the 1 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 mucus is eventually swallowed: ciliated: mucociliary elevator.
