Define the following terms :

1. Coordination
2. Neuron
3. Synapse
4. Brain
5. Spinal cord

1. Coordination — The interlinking of various activities and organs of a living being as per the needs of the body internally or externally is called coordination.

2. Neuron — The nervous system is made up of special cells called nerve cells or neurons. Neurons are the structural and functional units of the nervous system. They help in transmitting information throughout the body as electrical and chemical signals.

3. Synapse — The terminal branches of the axon of one neuron lie very close to the dendrites of another neuron. This point of contact is called a synapse.

4. Brain — The brain along with the spinal cord forms our central nervous system. It is responsible for regulating all bodily functions, processing information from the senses, controlling movement, and enabling thought, emotions, and memory.

5. Spinal cord — The spinal cord extends from the medulla of the brain and runs down almost through the whole length of the backbone. It is a long, thin, tubular structure of nervous tissue that extends from the base of the brain down the back. It acts as a pathway for messages between the brain and the rest of the body.