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Circulatory system: the blood circulation with heart, arteries and veins.

Digestive system: processing food with mouth, esophagus, stomach and intestines.

Endocrine system: communicating within the body using hormones.

Excretory system: eliminating wastes from the body

Immune system: defending against disease-causing agents.

Integumentary system: skin, hair and nails

Muscular system: moving the body with muscles.

Nervous system: collecting, transferring and processing information with brain and nerves.

Reproductive system: the mating organs.

Respiratory system: the organs used for breathing, the lungs.

Skeletal system: structural support and protection through bones.

Sensory system: Includes eyes, ears, nose, tongue, skin.

And that's 12!

Article posted August 2, 2011 at 12:19 AM • comment • Reads 489 • see all articles

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