telegraph

proteins

hormonal

electrical impulses

nerve

muscle

wire

the brain

100 years

10 years

1 month

1 year

spinal cord

a nerve

brains

all of the above

multipolar neurons

pyramidal neurons

Purkinje neurons

bipolar neurons

they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

they help carry oxygen to different parts of your body

prison cells

muscle cells

glial cells

stem cells

1 foot per second

1 meter per second

100 miles per hour

150 meters per second

stem cells

skin cells

liver cells

muscle cells