nerve

the brain

muscle

wire

1 meter per second

150 meters per second

1 foot per second

100 miles per hour

skin cells

liver cells

muscle cells

stem 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

100 years

1 year

10 years

1 month

bipolar neurons

Purkinje neurons

pyramidal neurons

multipolar neurons

muscle cells

stem cells

prison cells

glial cells

spinal cord

brains

all of the above

a nerve

telegraph

electrical impulses

proteins

hormonal