ANAT 101 Lecture Notes - Respiratory Tract, Paranasal Sinuses, Vocal Folds

• School: Queen's University
• Department: Anatomy and Cell Biology
• Course: ANAT 101
• Professor: Richard Oko

Document Summary

Goal of respiration: energy, atp, growth, defense, reproduction. Respiratory tract = conducting portion + respiratory portion. Functions of conducting portion: move air to and from gas-exchange surfaces to lungs, protects respiratory surfaces from. Nasal cavity anterior wall floor roof lateral wall medial wall. External nasal features: external nares, cartilage, nasal bones, vestibule. Nose hair (guards nasal cavity from sand, dust, insects. Separates nasal cavity from oral cavity posterior wall. Olfactory epithelium - sensory cells detect smell, info sent to brain through holes in cribiform plate of ethmoid bone. 3 pairs of nasal conchae: superior & middle (ethmoid bone), inferior nasal conchae (its own bone) Creates turbulent air flow, more time for filtration, warming, humidifying. Nasal septum (cartilage and bony components), divides nasal cavity into 2. Lecture #16 - respiratory system lateral wall has 3 pairs of nasal conchae *increases surface area -> creates more time for humidifying, warming, filtering.