the brain

muscle

wire

nerve

150 meters per second

1 foot per second

100 miles per hour

1 meter per second

prison cells

stem cells

glial cells

muscle cells

skin cells

muscle cells

liver cells

stem cells

they regenerate very quickly

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

multipolar neurons

Purkinje neurons

pyramidal neurons

bipolar neurons

spinal cord

a nerve

all of the above

brains

proteins

electrical impulses

hormonal

telegraph

1 month

10 years

1 year

100 years