Human Body Systems

3. This system carries needed substances to cells and carries waste products away from cells. In addition, blood contains cells that fight disease.
7. The structures of this system that eliminate urea, water, and other wastes include the kidneys, ureters, urinary bladder, and urethra.
9. Your body has three types of tissue that relates to this system - skeletal, smooth, and cardiac. Some of these tissues are involuntary, some are voluntary.
10. This system has three main functions. First, it breaks down food into molecules the body can use. Then, the molecules are absorbed into the blood and carried throughout the body. Finally, wastes are eliminated from the body.

1. This system receives information about what is happening both inside and outside your body. It also directs the way in which your body responds to this information.
2. The cells of this system can distinguish between different kinds of pathogens. This system's cells react to each kind of pathogen with a defense targeted specifically at that pathogen.
4. This is the production of eggs by the female and sperm by the male. The egg and sperm join together during fertilization.
5. This system moves oxygen from the outside environment into the body. It also removes carbon dioxide and water from the body.
6. This system has five major functions. It provides shape and support, enables you to move, protects your organs, produces blood cells, and stores minerals and other materials until your body needs them.
8. This system produces chemicals that control many of the body’s daily activities. This system also regulates long-term changes such as growth and development.