ANP 1105 Lecture Notes - Lecture 10: Bronchiole, Olfactory Mucosa, Nasal Cavity

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1105
• Professor: Joanne Savory

Document Summary

Major function of the respiratory system is to supply oxygen and dispose of carbon dioxide. First 2 functions handled by respiratory system; other two by cv system. Conduction zone: passage ways: nose, nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, terminal bronchioles / as well as providing passageway conducting zone organs also cleanse, humidify and warm incoming air. Respiratory zone: (site of gas exchange: composed of respiratory bronchioles, alveolar ducts, and alveoli. Functions: airway for respiration, moistens and warms incoming air, filters and cleans inspired air, resonating chamber for speech, olfactory (smell) receptors. Structure of external nose: differences in nose size/shape due to differences in nasal cartilages. Skin covering dorsal/lateral aspects of nose is thin; contains many sebaceous glands. Air enters nasal cavity via external nares (nostrils) divided by midline nasal septum (cartilage bone); air then goes via internal nares to nasopharynx. Rood of nasal cavity formed by ethmoid and sphenoid bones of skull.