1 foot per second

1 meter per second

150 meters per second

100 miles per hour

liver cells

skin cells

stem cells

muscle cells

they are very long compared to other cells in the body

they do not have a nucleus

they help carry oxygen to different parts of your body

they regenerate very quickly

pyramidal neurons

Purkinje neurons

bipolar neurons

multipolar neurons

100 years

1 year

1 month

10 years

stem cells

glial cells

muscle cells

prison cells

electrical impulses

hormonal

telegraph

proteins

nerve

the brain

wire

muscle

brains

a nerve

all of the above

spinal cord