Human Body Systems

The main systems of the human body are as follows:

1
Cardiovascular / Circulatory system
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
Mechanical and chemical processes that provide nutrients via the mouth, esophagus, stomach and intestines. Eliminates waste from the body.
3
Endocrine system
Provides chemical communications within the body using hormones.
4
Exocrine system
Sweat and other exocrine glands.
5
Integumentary system
Skin, hair, nails,
6
Lymphatic system / Immune system:
The system comprising a network of lymphatic vessels that carry a clear fluid called lymph. Defends the body against disease-causing agents.
7
Muscular system
Enables the body to move using muscles.
8
Skeletal system
Bones supporting the body and its organs.
9
Nervous system
Collects and processes information from the senses via nerves and the brain and tells the muscles to contract to cause physical actions.
10
Urinary system
The system where the kidneys filter blood.
11
Reproductive system
The sex organs required for the production of offspring.
12
Respiratory system
The lungs and the trachea that brings air into the body.

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