they do not have a nucleus

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they regenerate very quickly

1 meter per second

100 miles per hour

150 meters per second

1 foot per second

prison cells

stem cells

glial cells

muscle cells

1 month

10 years

100 years

1 year

bipolar neurons

multipolar neurons

pyramidal neurons

Purkinje neurons

skin cells

stem cells

muscle cells

liver cells

wire

nerve

muscle

the brain

all of the above

a nerve

brains

spinal cord

proteins

hormonal

electrical impulses

telegraph