Digestive system Flashcards
Mucosa
lumen with direct contact with bolus
submucosa
contains autonomic nerves and glands which send secertions through tubes into the lumen
muscularis
smooth muscle that is responsible for peristalsis
peristalsis
involuntary contractions that move food through the GI tract, nerves that control these contractions in the muscularis come from the submucosa
serosa
connective tissue
peritoneum
serous membrane that holds the stomach, liver, spleen, and SI and LI in the abdominal cavity
visceral vs parietal
visceral lines the organs
fluid sac inbetween
parietal lines the abdominal cavity walls
palate
roof of mouth
hard palate- anterior immobile with bone
soft palate: posterior mobile (helps in swallowing)
salivary glands
parotid, sublingual, salivary, submandibular
surrond the oral cavity and make saliva
deliver saliva to the oral cavity to help form the bolus
contributes to salivary amylase enzymes that begin breakddown of carbs
makes bread taste sweet
parotid
sits just in front of the ears
one on each side of the face
submandibular
part of the submandibular triangle, have a superficial and deep lobe
sublingual
smallest of salivary glands
lies between floor muscles of oral cavity
fauces
bolus is sent through the fauces to the oropharynx
pharynx
oropharynx- passes by palatine tonsils
laryngopharynx- epiglottis covers the trachea when swallowing food
enters esophagus
esophagus
peristalsis begins, we loose involuntary swallowing control
tube down to the esophageal sphincter, then to stomach
esophageal sphincter
tightens and prevents acid/stomach content from leaking into the esophagus, if not working can cause GERD
stomach
continuation of mechanical digestion
chemical digestion of proteins using pepsin
cardia
entrance section to the stomach
fundus
“apex” of the stomach
body
largest and main part of the stomach
where food break down occurs