telegraph

proteins

hormonal

electrical impulses

pyramidal neurons

multipolar neurons

bipolar neurons

Purkinje neurons

stem cells

prison cells

muscle cells

glial cells

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they regenerate very quickly

they do not have a nucleus

1 year

1 month

100 years

10 years

stem cells

liver cells

muscle cells

skin cells

1 meter per second

100 miles per hour

1 foot per second

150 meters per second

nerve

wire

muscle

the brain

a nerve

spinal cord

brains

all of the above