10 years

1 month

1 year

100 years

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

liver cells

skin cells

stem cells

muscle cells

150 meters per second

100 miles per hour

1 meter per second

1 foot per second

all of the above

brains

a nerve

spinal cord

muscle cells

stem cells

glial cells

prison cells

multipolar neurons

bipolar neurons

Purkinje neurons

pyramidal neurons

telegraph

hormonal

electrical impulses

proteins

muscle

the brain

wire

nerve