100 years

1 year

1 month

10 years

a nerve

spinal cord

brains

all of the above

muscle

the brain

nerve

wire

bipolar neurons

multipolar neurons

Purkinje neurons

pyramidal neurons

proteins

hormonal

telegraph

electrical impulses

150 meters per second

1 meter per second

100 miles per hour

1 foot per second

skin cells

liver cells

stem cells

muscle cells

they are very long compared to other cells in the body

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

muscle cells

prison cells

stem cells

glial cells