all of the above

spinal cord

brains

a nerve

proteins

telegraph

hormonal

electrical impulses

prison cells

stem cells

glial cells

muscle cells

pyramidal neurons

Purkinje neurons

bipolar neurons

multipolar neurons

muscle

nerve

the brain

wire

skin cells

muscle cells

liver cells

stem cells

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

they do not have a nucleus

100 years

1 month

10 years

1 year

1 meter per second

1 foot per second

150 meters per second

100 miles per hour