Body is divided into the following systems, thses are
1. Integumentary system
2. Digestive system
3. Vitamins and minerals
4. Respiratory system
5. Circulatory system
6. Excretory system
7. Nervous system
8. Sense organs
9. Endocrine system
10. Reproduction system
11. Locomotion
12. Skeleton, Joints and Muscles
All these systems are described in detail in next Chapters. All these systems carry out the body functions by which body carries all the activities properly.