lecture exam 3 (digestive, urinary/repro) Flashcards
digestion
breakdown of molecules to a size that can enter the body
mechanical digestion
change in size; GI tract movements
chemical digestion
change in structure; chemical reactions
4 tissue layers in oral cavity
mucosa
submucosa
muscle layers
serosa
oral cavity
entrance to GI tract
prehension and mastication
- lips (philtrum)
- tongue
- hard and soft palate
tongue
- grooming, moving food
- taste, pain, temp, touch, thermoregulation
salivary glands
- lubrication, antibacterial action, pH regulation, thermoregulation, enzymatic digestion
pharynx
swallowing
epiglottis
protection
esophagus
- connects pharynx and stomach
- folded mucosa = expansion
- swallowing
- dorsal, left to trachea
peristalsis
- begins in esophageal stage of swallowing
- propels food
segmentation
mixes food
abdominal cavity
consists of peritoneum, mesentery, and omentum
stomach
- storage
- chemical and mechanical digestion
- intrinsic factor for vitamin B12
- controlled release of chyme into intestine
gastro
stomach
ruminants
cows
sheeps
goat
monogastric
dogs
cats
horses
small intestine
duodenum - first
jejunum - longest
ileum - last (lymphoid tissue)
*digestion and absorption
*plications and villi
entero
intestine
pancreas
endocrine: hormones into blood stream
exocrine: enzymes and bicarbonate through duct to duodenum
liver
*not to do with digestion
- secrete substances essential for digestion/absorption of nutrients
- synthesizes nutrients and regulates their release into the bloodstream
- excrete toxic substances
- produces plasma proteins, cholesterol, and blood coagulation
bile
- lipid digestion and waste excretion
- stored in gall bladder
- enterohepatic circulation
large intestine (consist of)
- cecum
- colon (ascending, transverse, descending)
- rectum
- anus
large instestine (motility)
- slow motility: segmentation, peristalsis, antipenstalsis, mass movement
mixing ___ contact time with absorptive surface area
increases
large intestine functions
- absorption of water and ions
- completion of carbohydrate or protein microbial digestion and absorption