The human body contains several systems that work together to keep us alive. The main systems include the nervous system which senses the environment and coordinates the body's functions. The skeletal system provides structure and protection with bones and allows for movement with muscles. The circulatory system transports nutrients, oxygen, waste and defenses through the blood. Other key systems are the digestive system which breaks down food, respiratory system which intakes oxygen and removes carbon dioxide, excretory system which removes waste, and reproductive system which produces offspring. All systems communicate and depend on each other to maintain health.

1. Body Systems And Their Functions

2. Body Systems
Body Systems &
Their Functions
The human body is made up of a number of systems.
Each one performs a particular function.

3. Body Systems
Body Systems &
Their Functions
All the systems are linked together and communicate through the blood and the
nervous system. All these systems work together in our body to keep us alive.

4. Nervous System
Body Systems &
Their Functions
The Nervous System senses what is going on around you. It coordinates what you need to
do and transmits messages to different parts of the body telling them what to do.

5. Nervous System
Body Systems &
Their Functions
The main organs of the nervous system are brain, spinal cord and nerves.

6. Skeletal System
Body Systems &
Their Functions
The main organs of the Skeletal System are the bones. The skeletal system is
the hard, jointed framework that supports and protects the body.

7. Skeletal System
Body Systems &
Their Functions
Muscles are connected to the parts of the skeleton enabling the body to move.

8. Muscular System
Body Systems &
Their Functions
The main organs of the Muscular System are the muscles.

9. Muscular System
Body Systems &
Their Functions
Muscles contract to move parts of the body.

10. Circulatory System
Body Systems &
Their Functions
The main organs of the Circulatory System are heart,
blood vessels and blood.

11. Circulatory System
Body Systems &
Their Functions
The circulatory system transports substances such as food, oxygen and waste products
around the body. It also defends against diseases and transfers heat around the body.

12. Digestive System
Body Systems &
Their Functions
The main organs of the Digestive System are mouth, oesophagus (food pipe),
stomach, small intestine and large intestine.

13. Digestive System
Body Systems &
Their Functions
The digestive system digests the food so that it can pass into the blood.

14. Respiratory System
Body Systems &
Their Functions
The main organs of the Respiratory System are nose, wind pipe (trachea) and lungs.

15. Respiratory System
Body Systems &
Their Functions
The respiratory system transfers oxygen into the blood and gets rid of
carbon dioxide from the blood.

16. Excretory System
Body Systems &
Their Functions
The main organs of the Excretory System are kidneys, ureters, bladder,
urethra and skin. The excretory system gets rid of waste products from the body.

17. Reproductive System
Body Systems &
Their Functions
The main organs of the Reproductive System for females are ovaries, oviducts, uterus
and vagina for females. The main organs of the reproductive system for males are
testes, sperm tube, urethra and penis. The reproductive system produces offspring.

18. This presentation is a result of my experiences while I was
helping out my son with his school assignments and project
work. I am happy to share this with other students and their
parents. Hope you find this informative and useful. Thank you.
- Prashant Mahajan -
All pictures belong to their original authors, photographers.