100 miles per hour

150 meters per second

1 foot per second

1 meter per second

brains

spinal cord

all of the above

a nerve

multipolar neurons

pyramidal neurons

bipolar neurons

Purkinje neurons

skin cells

liver cells

muscle cells

stem cells

they do not have a nucleus

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

proteins

hormonal

telegraph

electrical impulses

100 years

1 year

1 month

10 years

glial cells

muscle cells

stem cells

prison cells

nerve

wire

the brain

muscle