Is a network of specialized cells that monitors the internal and external environment and initiates commands through which the body reacts.

Nervous system is a network of specialized cells that monitors the internal and external environment and initiates commands through which the body reacts.

Nervous system is very important part of our body because it is the system which is controlling our body. If there is no nervous system we could not perform any function. It sends the message to and from the brain to all parts of body.

They include lobsters and crabs

Apolar solvent will dissolve the sample of calcium chloride