Storyboard Text
- did that sandwich talk
- Here we go, first step to the small intestine, through the mouth
- He is just excited for his ride in the small intestine which is 2.5 to 5 cm wide and 23 feet long . The first 25 centimeters of the small intestine is called the Duodenum that is where mostabsorption of nutrientsoccurs and sandwich here will be digested
- but how can my small intestine digest all of you if you are wider than it.
- I don't know.
- I'll tell you and it is very simple your small intestine is not smooth, it is packed with wrinkles folds these folds are covered with tiny villi the villi are covered with even tinier projections called microvilli
- wow this is all so interesting! Can you tell me more?
- sure, scientists estimate that if you could flatten out the surface of your small intestine, it would almost cover a football field!
- if the small intestine was completely smooth, there would be very little opportunity for absorption of nutrients. This quickly leads to a lack of nutrients , no matter how much you would eat
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