توضیحات:

The human body is made up of multiple systems that work together to form life. Body systems are an organized group of tissue that forms a particular function. These functions work with other systems in the body. Some of the main systems of the body are digestive, circulatory, nervous, respiratory and muscular. Understanding these systems helps people know how the body functions and why the health of each of them is important for overall quality of life.

Circulatory system: ...
Digestive system and Excretory system: ...
Endocrine system: ...
Integumentary system / Exocrine system: ...
Immune system and lymphatic system: ...
Muscular system: ...
Nervous system: ...
Renal system and Urinary system.