1 meter per second

100 miles per hour

150 meters per second

1 foot per second

nerve

wire

muscle

the brain

telegraph

hormonal

electrical impulses

proteins

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

they regenerate very quickly

stem cells

muscle cells

skin cells

liver cells

prison cells

stem cells

muscle cells

glial cells

1 year

10 years

1 month

100 years

bipolar neurons

pyramidal neurons

Purkinje neurons

multipolar neurons

a nerve

spinal cord

brains

all of the above