1.Muscular system

2.Skeletal system -structural support and protection through bones

3.Reproductive system

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

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

6.Respiratory system

7.Circulatory /cardiovascular system - the blood circulation with heart, arteries and veins

8.Urinary/excretory system -eliminating wastes from the body

9.Integumentary system -skin, hair and nails

10.Lymphatic system -removal of interstitial fluid from tissues. It absorbs and transports fatty acids and fats as chyle to the circulatory system. The last function of the lymphatic system is the transport of immune cells to and from the lymph nodes.

11.Endocrine system -communicating within the body using hormones

12.Immune system -defending against disease-causing agents

Source: http://en.wikipedia.org/wiki/List_of_human_anatomical_features