unit d - digestive system
what are the two types of digestion
mechanical/physical
what are the two parts of the mammalian digestive system
alimentary canal
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
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
what secretion does the small intestine have?
carbohydrases
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)