wire

nerve

muscle

the brain

skin cells

stem cells

liver cells

muscle cells

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

pyramidal neurons

multipolar neurons

Purkinje neurons

bipolar neurons

prison cells

stem cells

muscle cells

glial cells

100 miles per hour

150 meters per second

1 foot per second

1 meter per second

a nerve

brains

spinal cord

all of the above

10 years

100 years

1 month

1 year

electrical impulses

telegraph

proteins

hormonal