ANHB1102 Lecture Notes - Lecture 20: Respiratory Epithelium, Bronchial Artery, Nasal Septum

• School: UWA
• Department: Anatomy and Human Biology/Anatomy, Physiology and Human Biology
• Course: ANHB1102
• Professor: Fiona O'Shea & Vanessa Hayes

Document Summary

Evolutionarily - increased internal complexity of lungs as increased metabolic rate/increased body size occurs in species". Embryological development: end of 4wks = branching at foregut, buds beyond that = beginning of respiratory system by 8wks = early respiratory structure resembles the lungs. Terminology: upper tract = respiratory organs of head and neck (ends at larynx). Conducting zone only. lower tract = organs of thorax. Both zones. conducting zone = passages that conduct air respiratory zone = gas exchange regions of the distal airways. Nasal cavity - vestibule (nose entrance) has strati ed squamous w hair. Lined by ciliated pseudo strati ed columnar epithelium, w goblet cells to create mucous. Hard and soft palet separate nasal and oral cavities. Nasal fossa = 2 separated by nasal septum. Fossa have conchae (bony shelves) covered by respiratory epithelium. Conchae increase sa of nasal cavity, and create resistance for air coming in. Pharynx - muscular funnel, extends from posterior nasal aperture to larynx.