11.1 Energy Requirements of People

11.1 Energy Requirements of People

• We will look at energy consumption, heat flow, andature control in animals.
• Most of the examples will be specific to people, but the principles are applicable to all animals.

• Energy is needed to function living systems.
• This energy is used in animals to circulate blood, get oxygen, and repair cells.
• Even at complete rest in a comfortable environment, the body needs energy to function.

• The energy expenditure goes up with activity.

• The amount of energy a person consumes depends on their weight and build.
• It has been found that the amount of energy consumed by a person during a given activity is the same for most people.
• The energy used for various activities is usually quoted in Cal/m2.
• Table 11.1 shows the rates of metabolism for some human activities.
• To get the total energy consumption per hour, we divide the rate by the surface area of the person.