The main systems of the human body are:
1. 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.
- Keeps the body's temperature in a safe range.
2. Digestive system and Excretory system:
- System to absorb nutrients and remove waste via the gastrointestinal tract, including the mouth, esophagus, stomach, and intestines.
- Eliminates waste from the body.
3. Endocrine system:
-Influences the function of the body using hormones.
4. Integumentary system/Exocrine system:
- Skin, hair, nails, sweat and other exocrine glands
5. Immune system and lymphatic system:
- Defends the body against pathogens that may harm the body.
- The system comprising a network of lymphatic vessels that carry a clear fluid called lymph.
6. Muscular system:
- Enables the body to move using muscles.
7. Nervous system:
- 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 and Urinary system
- The system where the kidneys filter blood to produce urine and get rid of waste.
9. Reproductive system:
The reproductive organs required for the production of offspring.
10. Respiratory system:
- Brings air into and out of the lungs to absorb oxygen and remove carbon dioxide.
11. Skeletal system:
- Bones maintain the structure of the body and its organs.
