Control and co-ordination
Control and Co-ordination Notes By:- Nagraj Sir • All the living organisms respond and react to changes in the environment around them. • The changes in the environment to which the organisms respond and react are called stimuli such as light, heat, cold, sound, smell, touch etc. • Both plants and animals respond to stimuli but in a different manner. Control and Coordination in Animals It is brought about in all animals with the help of two main systems : (a) Nervous system (b) Endocrine system NERVOUS SYSTEM The nervous system in humans can be divided into three main parts 1. Central Nervous System: The central nervous system is composed of the brain and the spinal cord. The brain controls all the functions in the human body. The spinal cord works as the relay channel for signals between the brain and the peripheral nervous system. 2. Peripheral Nervous System: The peripheral nervous system is composed of the cranial nerves and spinal nerves. The spina...