Human Anatomy and Physiology

How many systems are their in a human body?

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July 27, 2010 10:14AM

12 major systems

Cardiovascular 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

Lymphatic system

Muscular system: moving the body with muscles

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

Reproductive system: the sex organs

Respiratory system: the organs used for breathing, the lungs

Skeletal system: structural support and protection through bones