Human Nutrition: Absorption

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Yesterday I posted an overview of the digestive system. If you watched the lecture, you learned about the organs involved in digestion and the 3 major roles of digestion: ingestion, digestion, and absorption. It's always great to gain a better understanding of how our bodies work and absorption of nutrients really connects the dots from food to fuel. That's why today we are jumping into Human Nutrition: Absorption.

In today's free Biology video, you'll learn more about how our food is completely digested by enzymes and then passed into your blood. Nutrients must get from the small intestine and into our blood so that they can move around the body. While we know the small intestine is a very long organ, the surface area of its lining is even more than you would ever imagine thanks to villi. Villi are finger-like projections that line the small intestine, increasing the surface area and thereby maximizing the uptake in nutrients. They do much more than that, but you'll need to watch the video to find out more.


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This page contains a single entry by April Stockwell published on April 13, 2011 2:40 PM.

Introduction to the Digestive System was the previous entry in this blog.

The Fate of Absorbed Nutrients is the next entry in this blog.

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