nerve

wire

the brain

muscle

pyramidal neurons

Purkinje neurons

bipolar neurons

multipolar neurons

telegraph

hormonal

proteins

electrical impulses

liver cells

skin cells

stem cells

muscle cells

they are very long compared to other cells in the body

they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body

a nerve

all of the above

brains

spinal cord

1 meter per second

1 foot per second

100 miles per hour

150 meters per second

muscle cells

prison cells

stem cells

glial cells

100 years

10 years

1 month

1 year