Nervous system coordinates the activities of body. It is responsible for the coordination of biological activities inside the body through the network of specialised cells called neurons. It receives the information from surroundings and processes through neurons and interprets it and then responds accordingly.

Endocrine system is a discrete set of glands that secrete different types of hormones to the circulatory system in order to regulate the functions of the body. Each gland of the endocrine system is responsible for the secretion of different hormones which act as messengers between the nervous system and the organs of body.