Gastrointestinal System Flashcards
(35 cards)
GI basic function
bring nutrients into the internal environment
4 main functions of the GI system
absorption, secretion, motility, and digestion
which organs have stratified squamous epithelium
mouth, esophagus, anal canal
Which organs have simple columnar epithelium
stomach, small intestine, large intestine
What is the function of simple columnar epithelium
secretion and absorption
4 points of unicellular goblet cells
columnar, goblet shaped, apical mucus granules, basal nucleus
Two types of multicellular glands, examples
simple (stomach and small intestine), compound (salivary glands)
Why do multicellular glands have increased SA
for more secretion
4 layers of the gut tube
mucosa, submucosa, muscularis externa/proper, adventitia
4 layers of the mucosa
epithelium, laminar propria (FCT), muscularis mucosae, sometimes glands
What is submucosa made out of plus name the 3 parts
connective tissue, glands, blood vessels, submucosal nerve plexus
Name 3 layers of muscularis externa
inner (circular), myenteric plexus, outer (longitudinal)
What is ENS –
enteric nervous system
What is adventitia made out of
FCT
What is serosa
layer on the outside of the gut tube when in the peritoneal cavity
What is the peritoneum plus the 2 layers?
serous membrane, parietal (along body wall), visceral (along organ wall)
Define mesentery and omenta
mesentery = double layer of peritoneum organ to body wall, omenta = double layer of peritoneum organ to organ
Where does digestion start
mouth
Order of the mouth parts (3 parts)
fauces, oropharynx, esophagus
3 pairs of salivary glands and what they produce
parotid (serous fluid wit amylase), sublingual (mucous only), submandibular (mixed)
What is acinus and what do acinar cells secrete
group of cells, secrete amylase
What do duct cells secrete and what does it do
bicarbonate as buffering
What stops food form entering trachea
epiglottis
What two layers are folded in the esophagus
mucosa and submucosa
