spinal cord

all of the above

brains

a nerve

they do not have a nucleus

they regenerate very quickly

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

prison cells

glial cells

stem cells

muscle cells

1 month

100 years

10 years

1 year

wire

nerve

muscle

the brain

hormonal

telegraph

electrical impulses

proteins

100 miles per hour

150 meters per second

1 foot per second

1 meter per second

multipolar neurons

pyramidal neurons

Purkinje neurons

bipolar neurons

stem cells

skin cells

muscle cells

liver cells