hormonal

telegraph

electrical impulses

proteins

they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

wire

nerve

the brain

muscle

muscle cells

liver cells

stem cells

skin cells

spinal cord

brains

a nerve

all of the above

100 miles per hour

150 meters per second

1 foot per second

1 meter per second

10 years

100 years

1 month

1 year

muscle cells

glial cells

stem cells

prison cells

pyramidal neurons

bipolar neurons

Purkinje neurons

multipolar neurons