telegraph

electrical impulses

proteins

hormonal

multipolar neurons

Purkinje neurons

bipolar neurons

pyramidal neurons

glial cells

prison cells

muscle cells

stem cells

100 miles per hour

1 foot per second

150 meters per second

1 meter per second

muscle

the brain

wire

nerve

liver cells

stem cells

muscle cells

skin cells

they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

a nerve

spinal cord

all of the above

brains

1 month

10 years

100 years

1 year