100 miles per hour

1 meter per second

150 meters per second

1 foot per second

muscle cells

skin cells

stem cells

liver cells

they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

all of the above

brains

a nerve

spinal cord

muscle

the brain

wire

nerve

proteins

telegraph

hormonal

electrical impulses

1 year

10 years

100 years

1 month

pyramidal neurons

bipolar neurons

multipolar neurons

Purkinje neurons

prison cells

stem cells

muscle cells

glial cells