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unit d - digestive system

what are the two types of digestion

mechanical/physical

chemical

what are the two parts of the mammalian digestive system

alimentary canal

accessory organs

what is the alimenatry canal for?

this is where food passes through

what are the accessory organs for?

they p[roduce chemicals needed for digestion

where does digestion begin?

in the mouth

what type of digestion happens in the mouth

mechanical and chemical

what is teh physical action happening in the mouth

chewing!! with your teeth(canines and molars) and tongue

what is the chemical that ius released in the mouth

saliva!!

waht does your saliva do to food?

it turns it into a startch which slowly breakdowns to a monosaccride

waht organ directs food into the esophagus?

the epiglottis

what happens in the esophagus

peristalsis

what is paristalsis

its mucle contraction that helps push the food down

where does the food go next?

the stomach

waht types of digestion happen in the stomach

physical and mechanical

waht is food called once it has passes the esophagus?

bolus !!

waht are the mechanical actions that happen in. the stomach

rugae

muscle chum !!

waht are the chemicals in the stomach

stomach acid (hcl)

what are the secreations in the stomach

mucus and pepsinogen

what is pepsinogen

it is inactive !!

what is pepsin

it is active

what does hcl do?

it helps breakdown food and kills some bacteria

what is broken down protein?

polypeptide

what breaks down protein

pepsin

how does the stomach protect itself?

inactive enzyme and thick mucus

what do shincters do?

helps control food movement

waht secretion does the pancreas have?

pancreatic amylase

nucleases

lipase/phospholipase

bicarbonate ions

what secretion does the small intestine have?

carbohydrases

protases

waht do bicarbonate ions do?

nutralizes acids(is a base) as an optimal pH of 8

is bile mechanical or chemical?

mechanical

where is bile made

in the liver

where is bile stored?

in the gallbladder

where is bile released into

the small instestine

what helps the small intestine absorb all the nutrients

with villli and microvilli

what happens in the large intestine

absorbtion !!

what is the food called once itr has passed the stomach and is now a liquid?

chyme

what secretion is in the large intestine?

e.coli

what is the rectum for

to store poop!(feces)

what is trhe anus for?

to dispose the p[oop!(feces)

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