prison cells

stem 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

electrical impulses

telegraph

hormonal

proteins

muscle

the brain

wire

nerve

muscle cells

skin cells

stem cells

liver cells

100 years

1 year

10 years

1 month

spinal cord

a nerve

brains

all of the above

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons

1 foot per second

1 meter per second

150 meters per second

100 miles per hour