All organs in the body of a who works as a system. All the different systems is important to the body. If any system has malfunctioned, it affects other systems, we should recognize the different organs in the protection, maintenance, all systems working normally are strong and will always help us with good health. Nervous system, the reproductive system and the endocrine system, is vital to the body by helping to control the nervous system and sensory organs, every part helps the body work. The reproductive system to assist in succession next to and devoid of hormonal glands little according to the blood stream to the target organ to regulate the work of the different systems.