1 foot per second

100 miles per hour

150 meters per second

1 meter per second

a nerve

spinal cord

all of the above

brains

pyramidal neurons

bipolar neurons

multipolar neurons

Purkinje neurons

proteins

electrical impulses

hormonal

telegraph

stem cells

glial cells

muscle cells

prison cells

they help carry oxygen to different parts of your body

they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

10 years

100 years

1 year

1 month

skin cells

liver cells

stem cells

muscle cells

the brain

muscle

nerve

wire