digestive system Flashcards
what are the 4 layers of the digestive tract
mucosa, submucosa, muscularis, serosa
the muscularis layer is made of
layer of longitudinal and circular muscle
what muscles are involved in peristalsis
circular, longitudinal
what muscles are involved in segmentation/mixing
circular
what are the functions of the oral cavity
chemical testing (taste)
mechanical processing (chew)
lubrication
initial digestion of carbohydrates
where are the 3 salivary glands
parotid is under the ramus of the mandible
sublingual is under the tongue
the sub mandibular is under the body of the mandible
what are the 3 types of muscles in the pharynx and what do they do
palatal, - move soft palate up
laryngeal elevators, -move epiglottis
pharyngeal - moves food into oesophagus
what are the 3 phases of swallowing
buccal, pharyngeal, esophageal
what is unique about the esophagus’ anatomy
adventitia instead of serosis
what are the functions of the stomach
chemical, mechanical processing
storage
what are the 4 sections of the stomach and describe their location
the cardia is the entrance area.
the fundus is the top part
the pylorus is the exit of the stomach
the body is the space between fundus and phylorus
what are the regions of the small intestine in order
duodenum, jejunum, ilium
what structures in the small intestine absorb nutrients
villi on plicae
fingers on fingers
what are the functions of the large intestine
reabsorption of water
absorption of vitamins
storage
what are the regions of the large intestine in order
cecum
ascending colon
transverse colon
decending colon
sigmoid colon
rectum
