Anatomy and Cell Biology 3319 Lecture Notes - Lecture 39: Mastoid Part Of The Temporal Bone, Occipital Bone, Palatopharyngeus Muscle
24 Mar 2017
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Upper digestive tract oral cavity & pharynx. Tonsils: accumulation of lymphoid nodules (cid:862)first li(cid:374)e of defe(cid:374)se(cid:863) agai(cid:374)st orga(cid:374)is(cid:373)s e(cid:374)teri(cid:374)g oral or (cid:374)asal (cid:272)a(cid:448)ities. If infected, these tonsils can block the airways. Pharyngotympanic (auditory) tube nasopharynx to middle ear: with an infection, your nasal cavity can get inflamed & middle ear infection can occur (i. e. middle ear is a source of infection) Palatoglossal arch more anterior: both arches are muscles covered by mucous membrane, between the two arches are t he palatine tonsils. The area between 2 arches is also known as fauces: marks the end of the oral cavity & beginning of pharynx. Anterior view of oral cavity: uvula voluntary phase of swallowing w/ involuntary phase (where pharynx comes up) If you touch the uvula, there will be a gag reflex. Soft palette can be elevated to close off the opening between the oral pharynx & nasopharynx. Parotid: drains into vestibule of mouth; opposite upper second molar.
