hormonal

electrical impulses

telegraph

proteins

muscle cells

glial cells

prison cells

stem cells

Purkinje neurons

multipolar neurons

pyramidal neurons

bipolar neurons

spinal cord

brains

a nerve

all of the above

the brain

nerve

muscle

wire

100 miles per hour

150 meters per second

1 meter per second

1 foot per second

liver cells

stem cells

skin cells

muscle cells

1 year

1 month

10 years

100 years

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body