41 Questions
What is the name of the muscle that acts as the sphincter of the oral fissure?
Orbicularis oris
What is the slit-like space between the teeth, gingiva, and lips, and the cheeks?
Oral vestibule
What is the function of the perioral muscles?
To control the size of the oral fissure
What is the boundary of the oral cavity proper posteriorly?
Oropharynx
What occupies the space between the upper and lower dental arches when the mouth is closed?
Tongue
What is the name of the artery shown in Figure 6?
Superficial artery of face
What is the space between the upper and lower dental arches also known as?
Oral cavity proper
What boundaries the oral cavity proper laterally and anteriorly?
Teeth and dental arches
What is the main function of teeth?
To reduce, incise, and mix food with saliva during mastication
Which nerve supplies the lower part of the oral cavity?
Inferior labial branches of the mental nerves
What is the function of the alveolar bone?
To keep the structure of the oral cavity
How many teeth are present in adults?
32
What is the name of the nerve that supplies the upper part of the oral cavity?
Superior alveolar nerve
What happens to the gums after tooth extraction or loss?
They regress
What is the name of the nerve that supplies the tongue?
Lingual nerve
What is the name of the bone that surrounds the root of the tooth?
Alveolar bone
What type of fibers does the cervical esophagus receive from the recurrent laryngeal nerves?
Somatic motor and sensory fibers
Through which structure does the vagus nerve travel to reach the thoracic esophagus?
Esophageal plexus
What is the direction of the left vagus nerve?
Anteriorly and laterally
Which nerve forms the esophageal plexus?
All of the above
What is the function of the vagus nerve in the abdominal esophagus?
Regulation of gut motility
What is the mnemonic for the direction of the vagus nerves?
LARP
What is the name of the plexus that surrounds the left gastric and inferior phrenic arteries?
Periarterial plexus
What is the term for the abnormal enlargement of the esophagus?
Esophageal varices
Which artery branches from the celiac trunk towards the liver?
Common hepatic artery
Where do the right and left gastric veins drain into?
Hepatic portal vein
What is the function of the prepyloric vein?
To drain excessive hydrochloride
Which nerve provides parasympathetic innervation to the stomach?
Vagus nerve
What is the source of sympathetic innervation to the stomach?
T6-T9 segments of the spinal cord
Which lymph nodes drain the anterior and posterior surfaces of the stomach?
Gastric lymph nodes
What is the origin of the short gastric artery?
Splenic artery
Which part of the stomach receives blood supply from the left gastro-omental artery?
Greater curvature
What divides the tongue into its anterior and posterior surfaces?
Midline groove
At which level of the thoracic vertebrae is the esophageal hiatus located?
T10
What is the blood supply of the cervical portion of the esophagus?
Inferior thyroid artery
What is the blood supply of the thoracic portion of the esophagus?
Thoracic aorta
What is the blood supply of the abdominal portion of the esophagus?
Both
Into which vein does the cervical esophagus drain?
Inferior thyroid vein
Into which vein does the abdominal portion of the esophagus drain?
Left gastric vein
Which muscle of the tongue is NOT innervated by CN XII?
Palatoglossus
What is the level of the esophageal hiatus relative to the thoracic vertebrae?
At T10
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