BIOL-242 Lecture Notes - Lecture 29: Paranasal Sinuses, Nasal Cavity, Bronchiole
Document Summary
Chapter 22 part 1 | respiratory system anatomy. Pulmonary ventilation (breathing) // movement of air into and out of lungs. External respiration // o2 and co2 exchange between lungs and blood. Transport // o2 and co2 in blood. Internal respiration // o2 and co2 exchange between systemic blood vessels and tissues. Microscopic structures-respiratory bronchioles, alveolar ducts, and alveoli. Includes all other respiratory structures; cleanses, warms, humidifies air. Diaphragm and other respiratory muscles promote ventilation. Mucous and serous secretions contain lysozyme and defensins. Cilia move contaminated mucus posteriorly to throat. Inspired air warmed by plexuses of capillaries and veins. Nasal conchae // superior, middle, and inferior. Nasal meatus // groove inferior to each concha. Oropharynx needs strong epithelium: stratified because food is hitting it. In frontal, sphenoid, ethmoid, and maxillary bones. Lighten skull; secrete mucus; help to warm and moisten air. Muscular tube from base of skull to c6. Connects nasal cavity and mouth to larynx and esophagus.