they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

1 meter per second

100 miles per hour

150 meters per second

1 foot per second

10 years

100 years

1 year

1 month

stem cells

glial cells

muscle cells

prison cells

stem cells

muscle cells

skin cells

liver cells

wire

nerve

the brain

muscle

a nerve

spinal cord

all of the above

brains

bipolar neurons

Purkinje neurons

pyramidal neurons

multipolar neurons

proteins

telegraph

hormonal

electrical impulses