To provide a design of the inside of the tiny intestine for students that are blind or visually impaired to research and to assistance their expertise of the attribute of villi in digestion

Background information:

The structure of the little intestine is designed for absorption of nutrients. The inside of the small intestine is lined via villi that absorb nutrients from the liquid mixture referred to as chyme produced in the stomach from the food we eat. Biology publications commonly have a thorough image of the villi. Some plastic science models additionally display villi. However, this simple to produce design more accurately presents the concept of villi in a way that have the right to be accessed tactually and also visually. Blood vessels on the outside of the intestinal wall absorb nutrients so that they deserve to take a trip roughly the body in the blood.

You are watching: What are villi and what is their function


Preparation:

Use a bath mat made of chenille or other material via loops, cover the outside of the rug (non-looped side) with mesh (preferably red) left over from a bag of onions from the grocery keep or various other source. The mesh will certainly replicate the blood vessels. Roll the rug right into a tube through the loops on the inside. Fasten the rug through Velcro or hook and eye closures.


Materials


Small bath mat, around 2ft by 3ft.Mesh or netting from an empty bag of onions, or other mesh or netprefer materialVelcro or hook and eye closuresTactile drawing of villi and little intestine

Procedure


After analysis around the digestive system and the structure and also function of the little intestine, students research tactile pictures and models of the little intestine and the villi.Place hand also or arm and also hand also inside the tube shaped intestine version. Notice the villi poignant your arm and also hand.Examine the mesh netting simulating the tiny blood vessels on the external of the intestine. Remember from your analysis that the blood vessels in the wall of the intestine absorb the nutrients from food as it passes with the tiny intestine. Open the "intestine" to even more very closely examine the villi. Notice just how the villi produce an boosted surchallenge area to maximize the absorption of nutrients.

Resources

Hughes, Sarah, Head of Science. Making Models: New College Worcester, UK, 2009.Miller, Kenneth R. PhD. And Joseph s. Levine, Biology: Foundation Edition: Pearboy Education, Inc., 2010.

See more: You Are A Contestant On Jeopardy And It Is Your Turn, Chapter 12 Study Guide Flashcards

 

This activity was authored by Sarah Hughes, Head of Science, New College Worcester, UK.

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NGSS Standards:

LS1.A: Structure and Function


Read more about: Science, Life Science, STEM

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