Digestive System Flashcards
grinding & chopping (mastication)
mechanical digestion
breaking down of food
digestion
by the use of chemicals
chemical digestion
What is the route of food in the digestive system?
Mouth -> pharynx -> esophagus -> stomach -> small intestines (pancreas, liver, gallbladder) -> large Intestines -> rectum -> anus
roof of the mouth
palate
mix and pushes the food
tongue
3 pairs; produces salivary amylase
salivary glands
teeth for cutting
incisors
How many incisors are there?
8
teeth for tearing
canines
How many canines are there?
4
teeth for grinding
premolars and molars
How many premolars are there?
8
How many molars are there?
12
prevents food to enter in trachea
epiglottis
ball of food
bolus
peristalsis
movement of esophagus
temporary food storage and site of chemical digestion
stomach
folds of stomach
rugae
junction of esophagus and stomach
esophageal sphincter
junction of stomach and small intestine
pyloric sphincter
produce mucus (protects stomach)
mucous cells
produce HCl (softens food, kills bacteria)
parietal cells
produces pepsin (digest proteins)
gastric chief cells
digest starch
gastric amylase
digest fats (triglyceride → 1 free fatty acid)
gastric lipase
combined HCl, mucus and enzymes
gastric juice
partially digested liquid food
chyme
How long are the small intestines?
7m
How long are small intestines in diameter?
2.5cm
3 parts of the small intestine
duodenum, jejunum, ileum
completion of chemical digestion: pancreas, liver, and gallbladder
small intestine
largest internal organ
liver
produce Bile; stored in gall bladder
liver
digest fats into tiny droplets through emulsification
liver
secretes pancreatic juice
pancreas
reduce the chyme acidity
pancreas
trypsin (digest proteins)
pancreas
Carbs → Maltose
Pancreatic amylase
digests fats (triglyceride → 2 free fatty acid)
pancreatic lipase
tiny projections of Small I
vili
tiny projections of Villi
microvili
contains capillaries where the absorption of nutrients occurs
vili
Where are the vili and microvili found?
in the duodenum and jejunum
Absorbs calcium, zinc, and vitamins
ileum
How long is the large intestine?
1.5m
How long is the large intestine in diameter?
6.5cm
includes cecum, colon, rectum and anal canal
large intestine
produce vitamin K and some B vitamins using bacteria
large intestine
absorbs water
large intestine
indigestible material then
becomes solid and is called…?
feces
end of large intestine
rectum
temporary storage of waste material
rectum
end of the rectum
anus
where feces comes out of the body
anus
the anus consists of a muscular ring called…
anal sphincter
opens during a bowel movement to allow feces to pass through
anal sphincter
food poisoning; clostridium botulinum
foodborne botulism
food poisoning; salmonella
salmonellosis
salmonella Typhi; severe
typhoid fever
indigestion; Heartburn, nausea, vomiting
dyspepsia
disorder resulting to indigestion
organic dyspepsia
nervous disorder/no obvious cause can be found
functional dyspepsia
open sore in the mucous membrane
peptic ulcer
Gastric Ulcer
type of peptic ulcer
Duodenal ulcer
type of peptic ulcer
Difficulty in defecation due to dry feces
constipation
rapid movement of feces in the colon; insufficient removal of water
diarrhea
Painful infection of the colon
dysentery
cancer of the colon
colon cancer
diarrhea, nausea, vomiting & Cancer
effects of alcohol