Why does food need to be digested

Food has to be digested into smaller component nutrients that are then absorbed and used throughout your body. Calories in food provide your body with the energy it needs to complete vital processes such as cellular maintenance and reproduction, and respiration.

Explanation:

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Such entities are termed as ions

Explanation:

When atoms or molecules are subjected to net loss or gain of electrons, a net charge is developed in those atoms or molecule and now these atoms or molecules are termed as ions.

They become positive ions if the charge developed is due to the loss of electrons and they become negative ions if the charge developed is due to the gain of electrons. Only the loss of outer electrons takes place in the formation of ions because these electrons are loosely bonded.