spinal cord

brains

all of the above

a nerve

electrical impulses

hormonal

proteins

telegraph

they are very long compared to other cells in the body

they do not have a nucleus

they help carry oxygen to different parts of your body

they regenerate very quickly

150 meters per second

1 foot per second

1 meter per second

100 miles per hour

muscle cells

stem cells

liver cells

skin cells

10 years

100 years

1 year

1 month

prison cells

glial cells

stem cells

muscle cells

muscle

the brain

nerve

wire

pyramidal neurons

bipolar neurons

Purkinje neurons

multipolar neurons