skin cells

stem cells

muscle cells

liver cells

telegraph

proteins

electrical impulses

hormonal

150 meters per second

1 foot per second

1 meter per second

100 miles per hour

Purkinje neurons

bipolar neurons

pyramidal neurons

multipolar neurons

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

all of the above

a nerve

brains

spinal cord

1 year

10 years

1 month

100 years

stem cells

prison cells

glial cells

muscle cells

wire

nerve

the brain

muscle