närvisüsteemide

Närvisüsteemide is the Estonian term for nervous systems. A nervous system is a complex network of nerves and cells that carry messages to and from the brain and spinal cord to various parts of the body. It allows an organism to interact with its environment. Nervous systems are responsible for transmitting signals between different parts of an animal's body.

The basic unit of the nervous system is the neuron, also known as a nerve cell. Neurons transmit electrical and chemical signals. These signals are crucial for communication within the body, enabling functions such as movement, sensation, thought, and emotion.

There are two main types of nervous systems in the animal kingdom: the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS consists of the brain and spinal cord. It is the main processing center for the body. The PNS includes all the nerves outside of the brain and spinal cord. It acts as a communication link between the CNS and the rest of the body.

The nervous system allows for rapid responses to stimuli. It plays a vital role in maintaining homeostasis, the stable internal environment of the body. Disorders affecting the nervous system can have profound impacts on an individual's health and well-being.