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 foot per second

150 meters per second

100 miles per hour

1 meter per second

proteins

electrical impulses

hormonal

telegraph

1 month

10 years

100 years

1 year

stem cells

skin cells

muscle cells

liver cells

all of the above

a nerve

brains

spinal cord

stem cells

prison cells

muscle cells

glial cells

Purkinje neurons

bipolar neurons

pyramidal neurons

multipolar neurons

muscle

wire

the brain

nerve