telegraph

hormonal

electrical impulses

proteins

10 years

1 year

1 month

100 years

muscle cells

stem cells

prison cells

glial cells

a nerve

spinal cord

brains

all of the above

150 meters per second

1 foot per second

1 meter per second

100 miles per hour

the brain

muscle

wire

nerve

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

multipolar neurons

Purkinje neurons

bipolar neurons

pyramidal neurons

muscle cells

stem cells

skin cells

liver cells