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duodenum
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Duodenum
In vertebrates, a short length of alimentary canal found between the stomach and the small intestine. Its role is in digesting carbohydrates, fats, and proteins. The smaller molecules formed are then absorbed, either by the duodenum or the ileum.
Entry of food to the duodenum is controlled by the pyloric sphincter, a muscular ring at the outlet of the stomach. Once food has passed into the duodenum it is mixed with bile released from the gall bladder and with a range of enzymes secreted from the pancreas, a digestive gland near the top of the intestine. The bile neutralizes the acidity of the gastric juices passing out of the stomach and aids fat digestion.
© RM 2009. Helicon Publishing is division of RM.
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alimentary canal
amino acid
amylase
anus
balanced diet
bile
bloodstream
carbohydrate
colon (anatomy)
diffusion
digestion
duodenum
egestion
emulsify
enzyme
fat
fatty acid
fibre, dietary
food test
glycerol
growth (biology)
ileum
intestine
lipase
liver
mineral salt
mouth
nutrition
oesophagus
organ (anatomy)
pancreas
pepsin
peristalsis
protease
protein
repair
saliva
stomach
stomach acid
villus
vitamin
water
amino acid
amylase
anus
balanced diet
bile
bloodstream
carbohydrate
colon (anatomy)
diffusion
digestion
duodenum
egestion
emulsify
enzyme
fat
fatty acid
fibre, dietary
food test
glycerol
growth (biology)
ileum
intestine
lipase
liver
mineral salt
mouth
nutrition
oesophagus
organ (anatomy)
pancreas
pepsin
peristalsis
protease
protein
repair
saliva
stomach
stomach acid
villus
vitamin
water
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