100 miles per hour

1 meter per second

1 foot per second

150 meters per second

muscle

the brain

nerve

wire

they regenerate very quickly

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

hormonal

proteins

electrical impulses

telegraph

muscle cells

skin cells

liver cells

stem cells

pyramidal neurons

multipolar neurons

Purkinje neurons

bipolar neurons

brains

a nerve

spinal cord

all of the above

glial cells

muscle cells

stem cells

prison cells

10 years

1 month

1 year

100 years