digestive system written

oral cavity function

chemical and mechanical digestion

three major salivary glands and whether they secrete mucin or serous

parotid - serous

submandibular - mucin and serous

sublinguinal - mucin

amylase

saliva begins to digest starches

mucin

glycoprotein in saliva, helps form bolus

pharynx three regions

naso oro laryng

pahrynx two muscle layers

inner longitudinal

outer circular constrictor

what does outer circular constrictor do

drives peristalsis

function of esophagus

move food to the stomach via perstalsis

does the esophagus absorb or digest food

no

esophagus contains two valves/spincters

upper esophageal

lower esophageal (cardiac sphincter)

What valve controls food passage into the stomach

cardiac sphincter

does stomach do chemical or mechanical digestion and how

both and food bolus become chyme

4 regions of the stomach

cardia, fundus, body, pyloric region

ruggae

lining of the stomach is convuluted

gastric pits lead to

gastric glands

gastric glands contain 2 cells and does those produce

parietal cells - HCl

chief cells - pepsinogen

does small intestine do chemical or mechanical digestion

chemical digestion

what connects stomach to small intesting

pyloric valve

controls chyme passage into small intestine

pyloric valve

three subdivisions of small intestine

duodenum

jejunum

ileum

what are the structural modifications of the small intestine

circular folds

villi

microvilli

circular folds

folds in mucous and submucosa layer

slows movement of chyme

circular folds

villi

projections on the mucous layer

microvilli

projection on columnar epithelial cells

remaining digestion takes place via pancreatic juices released by _____ and _______

pancreas

brush border

functions of the liver

detoxification of blood, production of bile

4 lobes of the liver

left

right

caudate

quadrate

function of gallbladder

concentrates and stores bile

fat emulsifier

bile

release into duodenum is regulated by _______

hepatopancreatic sphincter

pancreas exocrine function

secretes pancreatic juice

pancreatice juice secretes into _______

pancreatic duct

what are the pancreatice juices

lipase

nuclease

trypsin

amylase

lipase

digests fats

nuclease

digests nucleic acids

trypsin

digests proteins

amylase

digests starches

function large intestine

elimination of waste from body

re-absorption / conservation of water

tenia oli

3 bands of longitduinal muscle

pocket-like sacs in the intestine

houstra

bundles of fat hanging off of external surface of large intestine

epiploic appendages

subdivisions of cecum

ascending

transverse

descending

sigmoid

which parts of the colin are retroperitional

ascending

descending

which parts of the colin are intraperitoneal

transverse and sigmoid

angular turns

flexures

three types of flexures

right hepatic flexure

left splenic flexure

sigmoid flexure

what are the two sphincters of the rectum and anal canal

internal, involuntary smooth muscle

external voluntary skeletal muscle