In order to accomplish your goals in life you must do a lot of work. Not work in the economic sense, but in the scientific sense, which means to transfer from one form to another by application of a force over some distance. The purpose of this work includes, but is not limited to; the regulation of temperature, maintaining chemical concentrations, blood circulation, breathing, nerve impulse production, physical movements, and manipulation of environmental objects. A side-effect of doing all this work is the production of thermal energy which you release to your environment as . The combination of doing work and generating heat depletes your internal energy reserves, requiring you to take in more chemical energy (food). The purpose of the human body is to facilitate the body’s , (energy input, energy storage, work output, and heat release), in order to maintain the conditions necessary for life and allow you to accomplish those things which are important to you.
A quantity representing the effect of applying a force to an object or system while it moves some distance.
A quantity representing the capacity of an object or system to do work.
An amount of thermal energy transferred due to a difference in temperature.
the process of transferring chemical potential energy stored in food to useful work and thermal energy