1 foot per second

150 meters per second

1 meter per second

100 miles per hour

10 years

1 month

100 years

1 year

brains

all of the above

a nerve

spinal cord

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

stem cells

prison cells

muscle cells

glial cells

muscle cells

liver cells

skin cells

stem cells

bipolar neurons

pyramidal neurons

Purkinje neurons

multipolar neurons

electrical impulses

hormonal

telegraph

proteins

nerve

muscle

the brain

wire