spinal cord

brains

all of the above

a nerve

the brain

muscle

wire

nerve

1 meter per second

100 miles per hour

1 foot per second

150 meters per second

telegraph

hormonal

proteins

electrical impulses

1 year

1 month

100 years

10 years

multipolar neurons

Purkinje neurons

bipolar neurons

pyramidal neurons

glial cells

stem cells

prison cells

muscle cells

they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

stem cells

muscle cells

skin cells

liver cells