wire

the brain

muscle

nerve

telegraph

electrical impulses

hormonal

proteins

they help carry oxygen to different parts of your body

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

liver cells

muscle cells

stem cells

skin cells

brains

spinal cord

a nerve

all of the above

1 meter per second

100 miles per hour

150 meters per second

1 foot per second

prison cells

muscle cells

glial cells

stem cells

10 years

1 year

100 years

1 month

pyramidal neurons

bipolar neurons

Purkinje neurons

multipolar neurons