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22 Cards in this Set

  • Front
  • Back
What are the functions of the digestive system?
ingestion
digestion
absorption
elimination
Where does each function occur in the body?
ingestion-mouth
digestion-mouth, stomach, duodenum
absorption- jejunum (small intestine)
elimination-
Where does mechanical digestion begin?
mouth
Where does chemical digestion begin?
mouth
Esophagus
leads to stomach
cardiac sphincter
upper end of stomach prevents backflow (heartburn) of acids and digestive enzymes
stomach
holds food and drink, starts some of the digestion
pyloric sphincter
ring of muscle that can constrict that allows the slow emptying of the stomach
duodenum
very 1st part of the small intestine-immediately after stomach (where most of the digestion occurs)
jejunum
second portion of the small intestine, absorptions of molecules, breaks lipids into tiny droplets
ileum
third section for absorption of nutrient molecules (fats and fat solubles)
colon
ascending, transverse, and descending parts (large intestine)
rectum
final section of large intestine leads out
liver
produces bile that neutralizes stomach acid
gall bladder
stores and releases bile into duodenum
pancreas
releases digestive enzymes into the duodenum (duct connects pancreas to stomach)
What are villi? Where are they found and why?
fold of intestine (small) to increase surface areas for diffusion of molecules
How do villi differ from microvilli?
they are on the villi
Where does most of your digestion occur
duodenum
What does bile do?
neutralizes stomach acid
Where does of the absorption occur?
jejunum
What are some of the primary functions of the liver?
makes bile
produce blood-clotting factors
produces vitamin A and cholesterol
filter out and detoxify harmful substances from the blood
recieves building block molecules from portal vein