all of the above

spinal cord

brains

a nerve

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

the brain

wire

muscle

nerve

muscle cells

glial cells

stem cells

prison cells

muscle cells

stem cells

liver cells

skin cells

100 miles per hour

1 foot per second

1 meter per second

150 meters per second

1 month

1 year

100 years

10 years

Purkinje neurons

pyramidal neurons

multipolar neurons

bipolar neurons

telegraph

electrical impulses

proteins

hormonal