In the body, the capacity to do the work of digesting and absorbing a meal, contracting heart muscles, fueling the heartbeat, and creating new body cells is referred to as

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Energy is required for the body to perform various functions such as digesting and absorbing meals, contracting heart muscles, fueling the heartbeat, and creating new body cells. Nutrients, whether essential or non-essential, are substances the body needs for energy, growth, and bodily functions, but the capacity to do work itself is defined as energy.

In the Body, the Capacity to Do the Work of Digesting