Respuesta :
The human nervous system includes billions of individual neurons that assist with internal communication.
The human nervous system consists of two main parts:
- The central nervous system (the brain and spinal cord) and
- The peripheral nervous system (the nerves that carry impulses to and from the central nervous system).
Neurons are the electrically excitable cells that make up the nerve tissues of the components of the central nervous system.
Neurons are made up of three regions;
- Dendrites - These are the branching processes of one neuron that connect to the axonal ends of the other neuron.
- Cell bodies - It is the soma of the neuron.
- Axon - It relays stimulus from one neuron to another.
Neurons are essential for internal communication by relaying chemical and electrical signals that help components of the nervous system communicate with effector organs. The complexity of neurons is reflected in different clades of the organism. Therefore, in addition to the structure of neurons, the number of neurons also varies from organism to organism. In humans, about 86 billion neurons contribute to the formation of nervous tissue in the brain. The number of neurons in the brain depends on multiple factors such as brain growth, history or current condition with neurodegenerative disorders, and the age of the individual.
To learn more about neurons visit the link:
https://brainly.com/app/ask?q=neurons
#SPJ4
