BIOL 1410 Lecture Notes - Lecture 14: Hyaline Cartilage, Ethmoid Bone, Nasal Septum

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 1410
• Professor: Paul Messing

Document Summary

Topic xiv: respiratory system: overview [chapter 22] Main functions: [22. 1: air movement in + out of lungs, exchange of gases (o2 + co2) between lungs and blood. Nose, nasal cavity, pharynx: lower respiratory system. Lined with mucosa (with one exception: all have epithelial tissue + ct, epithelial tissue for most = ciliated pseudostratified columnar epi. (with goblet cells) Cilia sweep mucous to esophagus where swallowed: connective tissue layer of all mucosa = lamina propria, respiratory system structures [22. 1, nose: Functions: exchange really occurs: airway passage (heat + moisten air) leads to lungs where gas, olfaction, speech (resonance chamber) Divided by nasal septum (plural septa: anterior part = hyaline cartilage, post. part = vomer, ethmoid, [maxillae, palatine bones]very little, vestibule [22. 3] Lined by skin with coarse hair: respiratory area. Mucosa = ciliated pseudostratified epithelium + ct. Chonchae protrude from walls: superior & middle ethmoid bone, inferior separate bone. Inferior to chonchae = nasal meatuses (shallow groove)