skin cells

muscle cells

stem cells

liver cells

1 meter per second

1 foot per second

100 miles per hour

150 meters per second

1 month

10 years

1 year

100 years

all of the above

spinal cord

a nerve

brains

hormonal

telegraph

proteins

electrical impulses

pyramidal neurons

Purkinje neurons

multipolar neurons

bipolar neurons

muscle

the brain

wire

nerve

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

glial cells

stem cells

muscle cells

prison cells