1 month

1 year

100 years

10 years

brains

a nerve

spinal cord

all of the above

prison cells

glial cells

muscle cells

stem cells

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they regenerate very quickly

they do not have a nucleus

liver cells

muscle cells

stem cells

skin cells

the brain

muscle

wire

nerve

bipolar neurons

multipolar neurons

Purkinje neurons

pyramidal neurons

proteins

electrical impulses

telegraph

hormonal

150 meters per second

1 meter per second

1 foot per second

100 miles per hour