the brain

wire

nerve

muscle

proteins

electrical impulses

telegraph

hormonal

150 meters per second

100 miles per hour

1 foot per second

1 meter per second

1 month

10 years

1 year

100 years

brains

spinal cord

all of the above

a nerve

bipolar neurons

pyramidal neurons

Purkinje neurons

multipolar neurons

muscle cells

stem cells

glial cells

prison cells

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

stem cells

skin cells

liver cells

muscle cells