Anatomy Flashcards
what is the outer connective tissue called in the digestive tract wall?
serosa
what is the circular muscle layer called?
muscularis externa
what else is in the muscularis externa apart from muscle?
myentetric plexus (neurone network)
what is found in the submucosa?
connective tissue, larger blood and lympth vessels, glands and submucous plexus (neurone network)
what is found in the mucosa?
mucous membrane, lamina propria (capillaries, enteric neurons, gut-associated lympthoid tissue), muscularis mucosae
What are the functions of the upper GI tract?
- mastication (chewing)
- taste
- deglutition (swallowing)
- salivation
how many teeth do adults have?
32
which joint articulates between the temporal bone and mandible?
temporomandibular joint
what are the muscles of mastication supplied by?
mandibular division of trigeminal nerve - CN V3
what does the temporalis m. do?
coronoid process of mandible to temporal fossa
what does masseter m. do?
angle of mandible to zygomatic arch
how many muscles control mastication?
4
how many muscles responsible for jaw opening/closing?
3 closing and 1 opening
What is the course of the mandibular division of trigeminal nerve (CNV3)?
Comes from pons, through foramen ovale to muscles of mastication and sensory area
what does the lateral pterygoid do?
pulls condyle of mandible to pterygoid plates of sphenoid bone
what does medial pterygoid do?
pulls angle of mandible to pterygoid plates of phenoid bone
what re the two cavities in the temporomandibular joint divided by?
articular disc
what is the superior cavity in temporomandibular joint for?
translocation
what is the inferior cavity in temporomandibular joint for?
rotation
what is aspiration?
inhalation of liquid or solid matter into lungs
what nerve is the posterior 1/3rd of the tongue supplied by?
CNIX -
what nerve is the 2/3rd of the tongue supplied by?
CNV3 (mandibular division of trigeminal nerve ) and CNVII (facial nerve)
what is the course of the facial nerve?
- from pontomedullary junction
- travel through temporal bone via internal acoustic meatus then stylomastoid foramen
- to supply taste ant. 2/3rd tongue, muscles of facial expression and glands in floor of mouth.
what does the chorda tympani nerve supply?
taste to anterior 2/3rd of tongue and parasympathetics to glands