EasyBiologyHigh School (9–10)GeneralLife Processes › NutritionHuman Body › Digestive SystemNumerical
A meal stays about 3 hours in the stomach, 4 hours in the small intestine and 20 hours in the large…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A meal stays about hours in the stomach, hours in the small intestine and hours in the large intestine.
- What is the total time in these three parts?
- What percentage of that time is spent in the large intestine?
Need a reminder? The key ideaShow
Saliva (salivary amylase): starch to sugar. Stomach: hydrochloric acid, pepsin for proteins, mucus. Small intestine: bile emulsifies fats and makes the food alkaline; pancreatic juice has trypsin and lipase; intestinal juice gives amino acids, glucose, and fatty acids with glycerol. Villi absorb the food; the large intestine takes back water.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Total. hours.
Step 2. Share. .
Answer: hours, and about of it in the large intestine, where water is slowly taken back.
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