digestive system 🍰
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Last updated 11:43 AM on 5/19/23
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39 Terms
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amylase
enzyme found in mouth that causes chemical digestion
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catalyst
a substance that speeds up chemical reaction, can be used again + again
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digestion
break down of large food molecules into smaller molecules
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enzymes
type of catalyst found in living organisms, made of protein
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peristalsis
where food moves through the esophagus
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name the whole digestive system
mouth, windpipe, epiglottis, salivary glands, esophagus, stomach, pancreas, gallbladder, liver, large intestine, small intestine, duodenum, rectum, anus
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mouth
chew food, enzymes, break down food
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salivary glands
produces amylase
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epiglottis
open and closed windpipe when you swallow
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windpipe
leads to respritory system
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esophagus
carries food from mouth to stomach
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stomach
stores + churns food, acid softens food + kills bacteria
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liver
makes bile for fat digestion, stores vitamins + minerals, removes toxins, breaks down fat
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gallbladder
stores bile
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pancreas
makes enzymes amylase + lipase
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duodenum
first part of small intestine
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large intestine
reabsorbs water into the blood stream, forms + stores faeces, contains good bacteria help provide vitamins b + k
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small intestine
absorption of nutrients
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rectum
stores + removes faeces
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anus
end of digestive canal, faeces exit
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stages of human digestion
ingestion, digestion, absorption, assimilation, egestion
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ingestion
food enters alimentary canal when it is placed in the canal
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digestion
complex food molecules become simple
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absorption
molecules pass through intestines into blood
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assimilation
nutrients put to use
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egestion
waste removed + exits
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enzymes e.g
starch to maltose
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why is it important for teeth
break down food so more surface area for amylase
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how much food can the stomach hold
2L
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what chemicals are in the stomach
enzymes + hydrochloric acid
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what is the stomach layered with
mucus, prevent acids + enzymes damaging wall
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how long is the small intestine
6M
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what percentage of digestion occurs in the small intestine
90%
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duodenum use
chemical digestion, produce digestive enzymes
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diffusion
nutrients entering small intestine + broken down small enough to pass through walls of the intestine
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villi
covers small intestine with small folds, one cell thick, own capillaries, nutrients to circulatory system
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pancreas juice
pancreatic juice
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large intestine length
1.5M
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how long does the LI hold food
10h - a few days
