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ANP1105 (101)
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Respiratory.docx

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Department
Anatomy and Physiology
Course
ANP1105
Professor
William Staines
Semester
Fall

Description
Notes for anat Pulmonary ventilation (RS): air moving in (inspiration) and out of lungs (expiration) External respiration (RS): gas exchange at alveolar level Transport of respiratory gases (CV): from lungs to tissues of the body Internal respiration (CV): gas exchange at tissue level ­RS and CV closely coupled Respiratory zone: (site of gas exchange) composed of respiratory bronchioles, alveolar ducts & alveoli Conducting zone: (Passage of gas; cleanse, humidifies, warms air) nose, nasal cavity, pharynx, larynx, trachea, bronchi,  bronchioles, terminal bronchioles 1.  Nose •  functions    a)  airway     b)  moistens & warms incoming air    c)  filters & cleans inspired air    d)  resonating chamber for speech    e)  olfactory (smell) receptors i) External nose: ­shape: difference in nasal cartilage ­lateral/anterior skin: thin so sebaceous oils • air enters nasal cavity via external nares (nostrils) ­ divided by midline nasal septum (cartilage  [ anterior = septal cartilage] » bone [ posterior= vomer bone] ) • air then goes via internal nares to nasopharynx •  roof of nasal cavity formed by ethmoid & sphenoid bones of skull ii) Internal nasal cavity ­Posterior nasal aperatures (Chaonae): nasal cavity is continuous posteriorly to nasal portion of pharynx  •  floor of nasal cavity formed by palate (anterior is hard [maxillary] ; posterior is soft [unsupported] ) ­nasal vestibule: part superior to the nostril with sebaceous and vibrissae (nose hairs that filters particles)     Alpha) olfactory mucosa: lines the slitlike superior region of the nasal cavi
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