hormonal

electrical impulses

telegraph

proteins

muscle cells

glial cells

prison cells

stem cells

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

they regenerate very quickly

1 meter per second

100 miles per hour

150 meters per second

1 foot per second

10 years

1 year

1 month

100 years

wire

muscle

nerve

the brain

pyramidal neurons

bipolar neurons

multipolar neurons

Purkinje neurons

spinal cord

brains

a nerve

all of the above

muscle cells

stem cells

skin cells

liver cells