digestive tract unit Flashcards
functions of digestive system
chemical/mechanical digestion, propulsion, absorption
tissue lining stomach/intestines
simple columnar
what substance does saliva break down
carbs, fat
what tissue lines the mouth and anus
strat squamous
contractions moving food down the esophagus
peristalsis
sphincter from esophagus to stomach
cardiac
sphincter from stomach to small intestine
pyloric
pepsin
made from hydrochloric acid in the stomach. digests proteins
where does most nutrient absorption occur
the small intestine
order of parts of small intestine
duodenum, jejunum, ileum
what does the pancreas send into the small intestine
enzymes to help with chemical digestion
why does the liver secret bile into the small intestine
to break down fats
where are bacteria that help form vitamins
large intestine
parts of large intestine
cecum, ascending, transverse, desend
peritoneum
double layered membrane around abdominal cavity
peristalsis
muscle contractions of esophagus to move food
esophagus to stomach sphincter
cardiac
cardiac region of stomach
entrance
fundus
top projection of stomach
pylorus of stomach
end of stomach leading to small intestine
rugae
folding in stomach
chemical digestion in stomach
hydrochloric acid forms pepsin which breaks down proteins (and carbs)
small intestine
main site of chemical digestion and nutrient absorption. contains bile to break fat (emulsification). also amalyse, lipase, trypsin and lactase.
ileocecal sphincter
from small intestine to large intestine.
segmentation
wave like contractions of intestines
cirrhosis of liver
gradual scarring caused by heavy drinking, obesity, and hepatitis
large intestine stors
bacteria to form vitamins
