Chapter 6: Control and Coordination

Chapter 6: Control and Coordination Class X Science Key Concepts Stimuli: The changes in the environment to which living organisms respond are called stimuli. Coordination: The working together of various organs in an organism to produce a proper response to a stimulus is called coordination. Coordination in Animals In animals, control and coordination are done by the nervous system and endocrine system. Parts of the Nervous System The Central Nervous System (CNS): Consists of the brain and spinal cord. The Peripheral Nervous System (PNS): Consists of cranial nerves arising from the brain and spinal nerves arising from the spinal cord. Human Brain The brain is the main coordinating centre in the human body. It is protected by the cranium and covered by three membranes called meninges filled with cerebrospinal fluid (CSF) which protects it from shocks. Forebrain: Consists of the cerebrum and olfactory lobes. It controls voluntary actions like touch, smell, hearing, taste, sight, and mental activi…