150 meters per second

100 miles per hour

1 meter per second

1 foot per second

muscle cells

liver cells

skin cells

stem cells

1 year

10 years

100 years

1 month

electrical impulses

telegraph

proteins

hormonal

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons

muscle

nerve

wire

the brain

muscle cells

glial cells

stem cells

prison cells

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

brains

a nerve

all of the above

spinal cord