How many systems are their in a human body?
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
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