General Body Functions

The living human being performs many functions as a part of daily life.

a. Nutrition. The body takes in materials for energy, growth, and repair. Since the body cannot produce its own energy, it must continually take in foods to supply that energy to carry on the life processes. This food also provides materials for growth and repair of the cells and tissues.

b. Motion and Locomotion. Being an erect, standing organism, the body requires special supporting structures. At the same time, it needs a mechanical arrangement to allow the parts to move (motion) and to move from place to place (locomotion).

c. Reproduction. For the species to continue, there must be reproduction, the formation of new human beings belonging to subsequent generations.

d. Control. All of this activity is controlled by three major systems of the body--heredity/environment, hormones, and the nervous system. Hormones provide a chemical control system. The nervous system works much like circuitry in a computer. In the final analysis, however, all of the structures and functions of the body are determined by special units called genes, the study of which is genetics and the transmission of which is heredity. Heredity determines the potential range of an organism's characteristics. The environment determines which potential characteristics are developed and to what degree.

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100 Pregnancy Tips

100 Pregnancy Tips

Prior to planning pregnancy, you should learn more about the things involved in getting pregnant. It involves carrying a baby inside you for nine months, caring for a child for a number of years, and many more. Consider these things, so that you can properly assess if you are ready for pregnancy. Get all these very important tips about pregnancy that you need to know.

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