A Calorie is a unit that is used to measure energy. In food, a Calorie represents a unit of energy. The Calories in the food and drink you consume each day helps your body to produce the energy it needs. Your body needs the energy to help you keep up with normal activities during the day, exercising, and bodily functions, like breathing.
Different foods contain different Calorie values. The number of Calories needed daily varies from person to person. Calorie intake also depends on several factors including the size of the body, gender, age and the range of your physical activity. An active person is going to need more Calories than a sedentary person and a man will need a higher Calorie intake than a woman, because of a larger body.
Simply, being, or existing, use Calories; for instance, breathing, pumping blood through your body, digesting food, etc. The Caloric amount used to simply survive is known as your Basal Metabolic Rate or BMR. Exercise and your normal activities, like washing dishes or showering, also burn Calories and add to your daily BMR.
The human body needs Calories to survive. Without Calories, there won’t be energy and without energy, our body cannot function. Our heart and lungs will stop and we will perish.