electrical impulses

proteins

hormonal

telegraph

skin cells

stem cells

muscle cells

liver cells

1 meter per second

150 meters per second

1 foot per second

100 miles per hour

1 month

1 year

100 years

10 years

the brain

nerve

wire

muscle

muscle cells

glial cells

prison cells

stem cells

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

bipolar neurons

multipolar neurons

pyramidal neurons

Purkinje neurons

all of the above

a nerve

brains

spinal cord