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Title: All about Braincells
Description: Information about brain cells, The central nervous system, Neurons, nerve cells, parts of a neuron, Different types of neurons, life span of neurons,...and many more. It also includes some pictures.
Description: Information about brain cells, The central nervous system, Neurons, nerve cells, parts of a neuron, Different types of neurons, life span of neurons,...and many more. It also includes some pictures.
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The cell (from
Latin meaning
cella
,
"small
room") is the basic structural, functional, and
biological unit of all known living
organisms
...
Cells hold a variety
of pieces and each cell type has a
different purpose
...
Living
things may be single-celled or they may be very complex such as a human
being
...
Our brain
and spinal cord are made up of many cells, including neurons and glial
cells
...
There are about 100 billion
neurons in the brain
...
Glial cells
make up 90 percent of the brain's
cells
...
Neurons nerve cells that
are
transmit nerve signals to and
from the brain at up to 200
mph
...
At
the other end of the axon,
the
axon
terminals
transmit the electro-chemical signal across a
synapse gap
(the
between the axon terminal and the receiving cell)
...
The
axon long extension of a nerve cell, takes information away from the
,a
cell body
...
Dendrites bring information
to the cell body
...
Myelin is
manufactured by Schwann's cells, and consists of 70-80% lipids (fat) and
20-30% protein
...
Dendrites branch from the cell body and receive
messages
...
DIFFERENT TYPES OF NEURONS:
There are different types of neurons
...
●
●
●
Sensory neurons or Bipolar neurons
carry messages from the
body's sense receptors (eyes, ears, etc
...
These neurons
have two processes
...
9% of all neurons
...
)
Motoneurons or Multipolar neurons
carry signals from the CNS
to the muscles and glands
...
Motoneurons account for 9% of all
neurons
...
)
Interneurons or Pseudopolare (Spelling) cells
form all the
neural wiring within the CNS
...
One axon communicates with the spinal cord;
one with either the skin or muscle
...
(Examples are dorsal root ganglia cells
...
Fortunately, there are about 100 billion
neurons in the brain
...
Glial cells are nerve cells
that don't carry nerve impulses
...
Types of glial cells include
Schwann's Cells, Satellite Cells, icroglia
M
, Oligodendroglia, and Astroglia
...
These cells
guide neurons during fetal development
Title: All about Braincells
Description: Information about brain cells, The central nervous system, Neurons, nerve cells, parts of a neuron, Different types of neurons, life span of neurons,...and many more. It also includes some pictures.
Description: Information about brain cells, The central nervous system, Neurons, nerve cells, parts of a neuron, Different types of neurons, life span of neurons,...and many more. It also includes some pictures.