all of the above

brains

a nerve

spinal cord

150 meters per second

1 meter per second

100 miles per hour

1 foot per second

stem cells

muscle cells

liver cells

skin cells

glial cells

prison cells

stem cells

muscle cells

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they regenerate very quickly

they do not have a nucleus

bipolar neurons

multipolar neurons

pyramidal neurons

Purkinje neurons

nerve

muscle

wire

the brain

electrical impulses

hormonal

proteins

telegraph

10 years

1 month

100 years

1 year