skin cells

stem cells

muscle cells

liver cells

hormonal

electrical impulses

telegraph

proteins

1 foot per second

100 miles per hour

150 meters per second

1 meter per second

wire

the brain

muscle

nerve

pyramidal neurons

bipolar neurons

Purkinje neurons

multipolar neurons

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

they regenerate very quickly

1 year

1 month

100 years

10 years

stem cells

muscle cells

glial cells

prison cells

brains

a nerve

spinal cord

all of the above