1 meter per second

150 meters per second

100 miles per hour

1 foot per second

telegraph

proteins

electrical impulses

hormonal

stem cells

liver cells

muscle cells

skin cells

muscle cells

stem cells

glial cells

prison cells

wire

the brain

muscle

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

bipolar neurons

Purkinje neurons

pyramidal neurons

multipolar neurons

100 years

10 years

1 year

1 month

brains

all of the above

a nerve

spinal cord