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Chemical digestion of food
Saliva and gastric acid contain enzymes that break the chyme down further with a process called chemical digestion, where our body further breaks everything we eat into small absorbable molecules.
The bolus keeps being pushed through the intestines and broken down by enzymes and other substances. Other organs also contribute to breaking the digested food into nutrients, which are then absorbed through the intestinal villi and sent to the bloodstream.
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The start of mechanical digestion
One remarkable ability of the human body is changing food into nutrients, allowing us to survive and thrive.
When we eat food, it ends up in our digestive system that is composed of several organs. The goal is to turn the food into nutrients.
- Mechanica...
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ATP can be compared to electric energy
Electricity can light your lamps or power your appliances. But electricity needs to be produced first. We need a fuel that can be converted into electricity, such as petroleum (carbohydrates) that is converted into gasoline (glucose). Or solar energy (fats) or wind power (protein...
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How nutrients change into energy
- The foods we eat are broken into three basic units: carbohydrates, fats, and proteins. They form the macronutrients.
- The macronutrients need to be further broken into simpler units that will be used to produce Acetyl-CoA.
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Storing energy for building
Glucose is the primary "fuel" that produce energy.
- Fats are packed into small units called lipoproteins and stored as body fat for later use.
- Proteins are broken into amino acids
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The energy inside the body
- Adenosine Triphosphate (ATP): Our bodies need energy. We get this energy through a pathway called metabolism. ATP is the most common "currency" used to trade energy between cells. ATP is a small coenzyme the cells in our body use as an energy source in most of their process...
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The start of mechanical digestion
One remarkable ability of the human body is changing food into nutrients, allowing us to survive and thrive.
When we eat food, it ends up in our digestive system that is composed of several organs. The goal is to turn the food into nutrients.
- Mechanica...
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