1. SKELETAL SYSTEM, 206 bones connected by tendons, ligaments and cartilage. The skeleton not only helps us move, but it's also involved in the production of blood cells and the storage of calcium.
2.MUSCULAR SYSTEM, 650 muscles aid in movement, blood flow and other bodily functions. There are three types of muscle: skeletal muscle which is connected to bone and helps with voluntary movement, smooth muscle which is found inside organs and helps to move substances through organs, and cardiac muscle which is found in the heart and helps pump blood.
3. DIGESTIVE SYSTEM, allow the body to break down and absorb food, and remove waste. It includes the mouth, esophagus, stomach, small intestine, large intestine, rectum, and anus. The liver and pancreas also play a role in the digestive system because they produce digestive juices.
4. RESPIRATORY SYSTEM allows us to take in vital oxygen and expel carbon dioxide in a process we call breathing. It consists mainly of the trachea, the diaphragm and the lungs.
5. NERVOUS SYSTEM controls both voluntary action (like conscious movement) and involuntary actions (like breathing), and sends signals to different parts of the body. The central nervous system includes the brain and spinal cord. The peripheral nervous system consists of nerves that connect every other part of the body to the central nervous system.
6. CIRCULATORY SYSTEM moves blood, nutrients, oxygen, carbon dioxide, and hormones, around the body. It consists of the heart, blood, blood vessels,arteries and VEINS.
7. ENDOCRINE SYSTEM consists of eight major glands that secrete hormones into the blood. These hormones, in turn, travel to different tissues and regulate various bodily functions, such as metabolism, growth and sexual function.
8. INMUNE SYSTEM is the body's defense against bacteria, viruses and other pathogens that may be harmful.
9. LYMPHATIC SYSTEM job is to make is to make and move lymph, a clear fluid that contains white blood cells, which help the body fight infection. It also removes excess lymph fluid from bodily tissues, and returns it to the blood.
10.The REPRODUCTIVE SYSTEM.