wire

muscle

nerve

the brain

hormonal

electrical impulses

telegraph

proteins

100 miles per hour

1 foot per second

1 meter per second

150 meters per second

1 year

10 years

100 years

1 month

stem cells

liver cells

muscle cells

skin cells

multipolar neurons

bipolar neurons

Purkinje neurons

pyramidal neurons

all of the above

spinal cord

a nerve

brains

glial cells

stem cells

muscle cells

prison cells

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

they regenerate very quickly