Question

What is the nervous system and how does it work?

Answer 1

The integumentary system, skeletal system, muscular system, lymphatic system, respiratory system, digestive system, nervous system, endocrine system, cardiovascular system, urinary system, and reproductive systems are among the eleven organ systems.

Complete Answer:
The nervous system is a highly complex part of an animal that coordinates its actions and sensory information by transmitting signals to and from various parts of its body, according to biology. The nervous system detects changes in the environment that affect the body and then works in tandem with the endocrine system to respond.
Around 550 to 600 million years ago, nerve tissue first appeared in wormlike organisms. The central nervous system (CNS) and the peripheral nervous system (PNS) are the two main parts of the nervous system in vertebrates (PNS). The brain and spinal cord make up the central nervous system. Nerves, which are enclosed bundles of long fibers or axons that connect the CNS to every other part of the body, make up the majority of the PNS.
Thus, Neurons are specialized cells that make up the nervous system. These neurons have the ability to both receive and transmit signals. It aids us in perceiving and reacting to changes in the external and internal environment. The central nervous system, which includes the brain and spinal cord, and the peripheral nervous system, which includes afferent (sensory) and efferent (motor) nerve fibers, make up the human nervous system. The CNS is the primary control and data processing center.
Nerve impulses or action potentials are generated and transmitted when a neuron is stimulated. The synapse is where nerve impulses are passed from one neuron to the next. Sensory neurons send information to the CNS from various organs and tissues, while motor neurons send regulatory impulses from the CNS to the target organ or tissue.

Note:
Nervous systems can be found in most multicellular animals, but their complexity varies greatly. Sponge, placozoans, and mesozoans, which have very simple body plans, are the only multicellular animals without a nervous system.