An organized being is one which is composed of organs. An organ is that which has a particular function to perform. Eyes are organs of sight, ears that of hearing, the olfactory organ has the sense of smell, the nerves of taste are distributed to the palate, epiglottis, larynx and the tongue. To these may be added the senses of pressure, temperature, pain, hunger and thirst. In common language it includes the principles and facts of the origin, development, structure, functions and distribution of plants and animals.
Life exists because of the exercise of organs.
Physiologists study functions, the action of organs. Physiology deals with the processes, activities and the phenomena incidental to life, the characteristic actions which constitute life, those qualities which determine a living organism from one which does not live, those actions which depend upon an intelligence. The body is incapable of creating new forces. Force is that which originates or arrests motion. Vital force is the energy which gives life or action to an organism, the vital power which distinguishes living matter from the dead.