all of the above

spinal cord

a nerve

brains

Purkinje neurons

bipolar neurons

multipolar neurons

pyramidal neurons

stem cells

glial cells

prison cells

muscle cells

they regenerate very quickly

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

nerve

the brain

wire

muscle

skin cells

liver cells

stem cells

muscle cells

electrical impulses

proteins

telegraph

hormonal

1 meter per second

100 miles per hour

150 meters per second

1 foot per second

10 years

1 month

100 years

1 year