Does human have a nervous system ? And why ? . Does animal have a nervous system ? And why ? . Does plants have a nervous system and why ? .

Yes, humans have a nervous system. The nervous system is a complex network of cells in the body that enables communication between different parts and helps coordinate their functions. It consists of the brain, spinal cord, and peripheral nerves, allowing us to process information, respond to stimuli, and control bodily functions.

Animals also have a nervous system. It is a vital component for their survival, as it allows them to receive information from their surroundings, process it, and respond accordingly. Animals use their nervous system to interact with their environment, find food, avoid danger, and engage in various behaviors essential for their survival and reproduction.

On the other hand, plants do not have a nervous system as animals do. Instead, they have a different system called the plant's "electrochemical signaling system." Plants lack a centralized nervous system, brain, or a network of nerves found in animals. However, they do have specialized cells and structures that enable them to respond to stimuli, such as light, gravity, and touch. These responses are regulated by hormones and electrical impulses, but they are different from the complex nervous systems animals possess.