1. Circulatory System – It is to move blood, nutrients, oxygen, carbon dioxide, and hormones, around the body.
2. Digestive System – Consists of a series of connected organs that together, allow the body to break down and absorb food, and remove waste.
3. Endocrine System – Consists of eight major glands that secrete hormones into the blood.
4. Immune System – It is the bodys defense against bacteria, viruses and other pathogens that may be harmful.
5. lymphatic System – Includes lymph nodes, lymph ducts and lymph vessels, and also plays a role in the bodys defenses.
6. Nervous System – Controls both voluntary action and involuntary actions and sends signals to different parts of the body.
7. Muscular System – Consists of about 650 muscles that aid in movement, blood flow and other bodily functions.
8. Reproductive System – It is allows humans to reproduce.
9. Respiratory System – It isallows us to take in vital oxygen and expel carbon dioxide in a process we call breathing.
10. Urinary System – It is helps eliminate a waste product called urea from the body, which is produced when certain foods are broken down.
11. Human Brain – It is the bodys control center, receiving and sending signals to other organs through the nervous system and through secreted hormones.
12. Human Heart – It is a responsible for pumping blood throughout our body.
13. Kidneys – It is to remove waste and extra fluid from the blood.
14. The lungs – The lungs are responsible for removing oxygen from the air we breathe and transferring it to our blood where it can be sent to our cells.
15. The liver – Breakdown of drugs, filtering of blood, and secretion of bile and production of blood-clotting proteins.