telegraph

proteins

hormonal

electrical impulses

glial cells

muscle cells

stem cells

prison cells

150 meters per second

1 foot per second

100 miles per hour

1 meter per second

the brain

muscle

wire

nerve

a nerve

brains

spinal cord

all of the above

bipolar neurons

multipolar neurons

Purkinje neurons

pyramidal neurons

they help carry oxygen to different parts of your body

they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

10 years

1 month

100 years

1 year

muscle cells

skin cells

stem cells

liver cells