the brain

nerve

wire

muscle

10 years

100 years

1 month

1 year

spinal cord

a nerve

all of the above

brains

telegraph

hormonal

proteins

electrical impulses

multipolar neurons

bipolar neurons

pyramidal neurons

Purkinje neurons

muscle cells

prison cells

stem cells

glial cells

stem cells

liver cells

muscle cells

skin 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

1 meter per second

1 foot per second

100 miles per hour

150 meters per second