Only one but there are several divisions of it such as central vs peripheral or sympathetic vs parasympathetic nervous system. It's all one but different ways of dividing it up to make sense of it.
There are about 100 billion nerves in the brain.
Billions!
no
nerve cells called neurons
The answer is to let a 13 year old back in school
nerve cells make nervous tissue and muscle tissue is made up of muscle cells
A nerve fiber is a threadlike extension of a nerve cell and consists of an axon andmyelin sheath (if present) in the nervous system. There are nerve fibers in the central nervous system and peripheral nervous system. A nerve fiber may be myelinated and/or unmyelinated. In the central nervous system (CNS), myelin is produced byoligodendroglia cells. Schwann cells form myelin in the peripheral nervous system (PNS). Schwann cells can also make a thin covering for an axon which does not consist of myelin (in the PNS). A peripheral nerve fiber consists of an axon, myelin sheath, Schwann cells and its endoneurium. There are no endoneurium and Schwann cells in the central nervous system. A myocyte (also known as a muscle cell or muscle fiber) [1] is the type of cell found inmuscle tissue. They are long, tubular cells that arise developmentally from myoblasts to form muscles in a process known as myogenesis. [2] There are various specialized forms of myocytes: cardiac, skeletal, and smooth muscle cells, with various properties. Cardiac myocytes are responsible for generating the electrical impulses that control the heart rate, among other things
Nerve cells are the basic functioning component in the nervous part of the system whether peripheral or central is comprised of neurons that collect and distribute information to make the body function.
ventral nerve cord
It is called a dendrite.~
The spinal cord and the brain make up part of the nervous system called the central nervous system. The rest of the system is made up of the peripheral nervous system.
nerve cells are everywhere! for example, you get inched and it hurts. the pain sends signals to your brain. your brain then causes you to react...by saying OUCH!!! When the signals get sent to your brain, your brain tells them how to react...you bbleed, your brain tells the affected area to create a scab.
I don't know since I am taking a test, but I just put "neuron" for the heck of it.
Neurons are the cells that make up the nervous system.