Marine Corps Physical Fitness Test. Fitness is essential to the day-to-day effectiveness and combat readiness of the Marine Corps. The Marine Corps considers physical fitness an indispensable aspect of leadership.
A: Chemical energy is for producing heat in the human body to sustain vital functions, converting solar energy in plants through photosynthesis, producing electrical energy in batteries to power devices and burning fossil fuels in combustion engines to produce heat or motion.
Â· just now. Report Abuse. The sources of energy in the human body are varied. We use sugar for energy, we can generate energy from protein and fat. We store energy in our bodies, and when we are starved, we will use any available sources in our bodies to provide the energy we need to live.Starving people don't just loose weight from fat (lipids), they also loose muscle mass as that is converted into energy.e store energy in our bodies, and when we are starved, we will use any available sources in our bodies to provide the energy we need to live. Starving people don't just loose weight from fat (lipids), they also loose muscle mass as that is converted into energy.