By-products of Cellular Respiration Video

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  • 0:04 What Are By-Products?
  • 0:46 Cellular Respiration
  • 1:35 The Creation of By-Products
  • 2:39 Lesson Summary
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Lesson Transcript
Instructor: Stephanie Matalone

Stephanie taught high school science and math and has a Master's Degree in Secondary Education.

During cellular respiration, your body turns energy from food into a usable food for your cells. When this happens, other products that your body doesn't need are made. In this lesson, we will discuss the by-products of cellular respiration.

What Are By-Products?

By-products are substances that are unintentionally made in the process of making an intended product. They occur in cellular respiration, but you can find them in all other sorts of places in the world. For example, maybe you were cooking dinner last night. You threw some meat in a pan and cooked it up with some nice spices and oil. When you got done, you had a delicious piece of meat to eat, the product of cooking and all your hard work. But during the process, you have some liquid left over in the pan - a combination of oil, juice from the meat, and some other things - that you discarded down the drain. That liquid was the by-product of cooking. The whole point of cooking was to get the meat to eat, but in the process, you made some extra liquid that was not needed.

Cellular Respiration

Cellular respiration is the process in which organisms turn glucose from the food they eat into adenosine triphosphate. Adenosine triphosphate (or ATP) is a molecule that stores energy and transports it around the body. ATP has three phosphate groups. When one is broken off, energy from the bond is released. Cells use that energy to perform their jobs in the body.

In order to create ATP, the body takes in oxygen and glucose as reactants. Cellular respiration can be seen as a chemical reaction that changes reactants into products. This is the chemical equation for cellular respiration. The reactants are on the left of the arrow and products are on the right.

C 6 H 12 O 6 (glucose) + 6O 2 (oxygen) --> 6CO 2 (carbon dioxide) + 6H 2 O (water) + ATP

You can see that one glucose molecule plus 6 oxygen molecules create six carbon dioxide molecules, six water molecules, and ATP.

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