proteins

hormonal

electrical impulses

telegraph

stem cells

prison cells

glial cells

muscle cells

the brain

muscle

nerve

wire

they regenerate very quickly

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they do not have a nucleus

liver cells

skin cells

muscle cells

stem cells

1 meter per second

100 miles per hour

150 meters per second

1 foot per second

1 year

10 years

100 years

1 month

multipolar neurons

Purkinje neurons

bipolar neurons

pyramidal neurons

all of the above

a nerve

brains

spinal cord