Respiratory System Epithelia:
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At nostril: Stratified Squamous E
Nasal Cavities through Nasopharynx: PCCE
Oropharynx to top of Vocal Cords (in Larynx): Stratified Squamous E
Below the Vocal Cords (in Larynx) through Trachea into beginning of bronchi:
PCCE
From that point to respiratory surfaces (alveoli) gradually thins through:
PCCE →→→ Simple Columnar →→→ Simple Cuboidal →→→ Simple Squamous E
Respiratory System Support Structures:
Nose/Nasal Cavities/Sinuses: Various bones (maxilla, ethmoid, sphenoid, vomer,
inferior nasal concha, etc.) and hyaline cartilage wedge septum between nostrils
Larynx: (Hyoid) bone; hyaline cartilage for most (includes thyroid, cricoid,
arytenoid); elastic cartilage (for epiglottis); dense regular (for cricothyroid)
ligament; elastic connective tissue (for
vocal cords)
Trachea and bronchial tree: hyaline cartilage rings in trachea (C-rings) and
large bronchi give
way to irregular pieces of hyaline cartilage and then to no cartilage in
bronchioles (but more
smooth muscle)
Lung (stroma): Elastic connective tissue