what is the fifth cranial nerve?
two intrinsic tongue muscles that make the tongue short and thick
what are superior and inferior longitudinal?
the common carotid artery splits again into the ______ and _______
what are the external and internal carotid arteries?
carry deoxygenated blood to the lungs
what are veins?
hormone that endocrine thyroid gland produces and secretes to stimulate the body's metabolic rate
what is thyroxin?
fibrous joint capsule completely encloses the TMJ, wrapping around the temporal bone's articular eminence, fossa and mandibular condyle
what is the joint capsule?

origin: zygomatic arch
insertion: angle of mandble
elevates mandible
what is the masseter?
insertion: tongue
retracts tongue, moves it superiorly
what is the styloglossus?
supplies occipital and posterior auricular
what is the posterior branch of the external carotid artery?
deeper of the two jugular veins
drains the head, brain, face, and neck
what is the internal jugular vein?
endocrine gland behind the sternum
location where T-lymphocytes mature
shrinks after puberty
what is the thymus?
clear, viscous liquid in the joint that reduces friction
what is the synovial fluid?

origin: temporal fossa
insertion: coronoid process of mandible
elevates and retracts mandible
what is the temporalis?
two intrinsic muscles of the tongue that make the tongue long and narrow
what are transverse and vertical?
supplies the sublingual area of the oral cavity, sublingual salivary glands, floor of mouth, and tongue
what is the lingual branch of the external carotid artery?
the facial vein is a valveless vein where blood can reverse direction and flow backwards to the __________
what is the cavernous sinus?
mixed secretions of fluids, but mostly serous
secretes 65% of total saliva
what is the submandibular gland?
connects zygomatic process of temporal bone and lateral/posterior surface of mandible
prevents mandible from moving too far back
what is the temporomandibular ligament?

orgin: medial surface of lateral plate of pterygoid process and mx tuberosity (deep and superficial heads)
insertion: angle of mandible
elevates mandible
what is the medial pterygoid muscle?
origin: hyoid bone
insertion: tongue
depresses the tongue
what is the hyoglossus?
divides into maxillary and temporal arteries, two branches that split within the parotid gland
what is the terminal branch of the external carotid artery?
a large network of blood vessels
improper administration of PSA block may injure this area and cause a hematoma
what is the pterygoid plexus of veins?
mostly mucous secretions
what is the sublingual salivary gland?
connects styloid process and angle of mandible
prevents mandible from moving too far forward
what is the stylomandibular ligament?

origin: infratemporal crest of greater wing of sphenoid bone or lateral surface of pterygoid process (upper and lower heads)
depresses mandible
what is the lateral pterygoid muscle?
origin: geniotubercles
insertion: tongue
sticks tongue out, depresses part of tongue
what is the genioglossus?
ascending pharyngeal, provides blood to the pharyngeal walls, soft palate, and meninges
what is the medial branch of the external carotid artery?
collects blood from middle meningeal, PSA, IA veins, etc
located behind pterygoid plexus of veins
what is the maxillary vein?
the largest encapsulated major salivary gland that secretes serous fluid
what is the parotid gland
connects sphenoid bone and mandibular foramen
can be in the way of IAL block
prevents mandible from moving to far forward
what is the sphenomandibular ligament?