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Yes, they do
by the air sacs
it tells the other cells what to do...
It is Pathogenic
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Nutrients are absorbed into the bloodstream. Starch is broken down by enzymes. Macromolecules are broken down.
During metabolism, energy nutrients are broken down and distributed to cells throughout the body. These nutrients are used to power cell functions.
The digestive system breaks food down into useful nutrients.
Glucose:)
Glucose
Think of nutrients as fuel and building materials. They are necessary for a process called metabolism, which means building up and tearing down.
Absorption allows the nutrients that were produced during digestion to get "sucked up" and passed to the cells. Remember, we are just a bunch of cells and we must keep them alive. So, the nutrients are absorbed, given to the cells (via the circulatory system), and then they can use the nutrients to survive.