ANP 1105 Lecture Notes - Lecture 11: Olfactory Mucosa, Nasal Cavity, Alveolar Duct
6 Mar 2017
School
Department
Course
Professor
Document Summary
1st 2 f-ons handled by respiratory system (other 2 by cv syst. ) Conduction zone passageways. >> nose, nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, terminal bronchioles + these organs also cleanse, humidify & warm incoming air. Nose: airway for respiration, moistens + warms air, filters + cleans inspired air, resonating chamber for speech, olfactory (smell) receptors. Of external nose differences in nose size/ shape due to diff. in nasal cartilage. *** 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. Roof of nasal cavity formed by ethmoid & sphenoid of skull. Nasal cavity lines by 2 types of mucosa: Floor of nasal cavity formed by palate (anterior= hard, posterior= soft: olfactory mucosa: contains receptors for sense of smell. Pseudostratified ciliated columnar epithelium with goblet cells.
