List of systems of the human body

The main systems of the human body are as follows:

• Clockwise from top left: the integumentary
• skeletal
• nervous
• cardiovascular
• endocrine and muscular systems.

• Clockwise from top left: the lymphatic
• respiratory
• urinary
• reproductive (female
• male) and digestive systems.

1. Cardiovascular/Circulatory system:
   1. Circulates blood around the body via the heart, arteries and veins, delivering oxygen and nutrients to organs and cells and carrying their waste products away.
2. Digestive system / Excretory system:
   1. Mechanical and chemical processes that provide nutrients via the mouth, esophagus, stomach and intestines.
   2. Eliminates waste from the body.
3. Endocrine system:
   1. Provides chemical communications within the body using hormones.
4. Integumentary system/ Exocrine system:
   1. Skin, hair, nails, sweat and other exocrine glands.
5. Lymphatic system / Immune system:
   1. The system comprising a network of lymphatic vessels that carry a clear fluid called lymph.
   2. Defends the body against disease-causing agents.
6. Muscular system/Skeletal system:
   1. Enables the body to move using muscles.
   2. Bones supporting the body and its organs.
7. Nervous system:
   1. Collects and processes information from the senses via nerves and the brain and tells the muscles to contract to cause physical actions.
8. Renal system / Urinary system:
   1. The system where the kidneys filter blood.
9. Reproductive system:
   1. The sex organs required for the production of offspring.
10. Respiratory system:
    1. The lungs and the trachea that bring air into the body.