proteins

telegraph

electrical impulses

hormonal

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

wire

muscle

the brain

nerve

1 year

1 month

10 years

100 years

1 meter per second

150 meters per second

1 foot per second

100 miles per hour

prison cells

stem cells

glial cells

muscle cells

all of the above

a nerve

brains

spinal cord

stem cells

skin cells

liver cells

muscle cells

bipolar neurons

pyramidal neurons

Purkinje neurons

multipolar neurons