telegraph

hormonal

electrical impulses

proteins

a nerve

brains

spinal cord

all of the above

they are very long compared to other cells in the body

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

the brain

wire

nerve

muscle

multipolar neurons

pyramidal neurons

bipolar neurons

Purkinje neurons

100 years

1 month

10 years

1 year

stem cells

muscle cells

liver cells

skin cells

1 meter per second

1 foot per second

150 meters per second

100 miles per hour

glial cells

stem cells

prison cells

muscle cells