100 years

10 years

1 month

1 year

they help carry oxygen to different parts of your body

they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

100 miles per hour

150 meters per second

1 foot per second

1 meter per second

electrical impulses

proteins

hormonal

telegraph

stem cells

muscle cells

skin cells

liver cells

nerve

the brain

muscle

wire

muscle cells

stem cells

glial cells

prison cells

brains

spinal cord

all of the above

a nerve

multipolar neurons

Purkinje neurons

bipolar neurons

pyramidal neurons