The digestive and excretory systems review - Khan …
https://www.khanacademy.org:443/science/high-school-biology/hs-human-body-systems/hs-the-digestive-and-excretory-systems/a/hs-the-digestive-and-excretory-systems-review
OverviewThe digestive systemAccessory organsThe excretory systemUrinary tractCommon mistakes and misconceptionsKey termsThe digestive systemThe human digestive system breaks food down into small molecules that can be used by cells i…Digestion begins when food enters the mouth (oral cavity). Both mechanical and chemical digestion occur in the mouth. Teeth grind and break up food (mechanical), while an enzyme in saliva called amylase begins to break down carbohydrates (chemical).See more on khanacademy.org Key termsThe digestive system The human digestive system breaks food down into small molecules that can be used by cells i…Digestion begins when food enters the mouth (oral cavity). Both mechanical and chemical digestion occur in the mouth. Teeth grind and break up food (mechanical), while an enzyme in saliva called amylase begins to break down carbohydrates (chemical). makeup
Key termsThe digestive system
The human digestive system breaks food down into small molecules that can be used by cells i…Digestion begins when food enters the mouth (oral cavity). Both mechanical and chemical digestion occur in the mouth. Teeth grind and break up food (mechanical), while an enzyme in saliva called amylase begins to break down carbohydrates (chemical).
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