they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

stem cells

skin cells

muscle cells

liver cells

electrical impulses

proteins

telegraph

hormonal

nerve

the brain

wire

muscle

1 meter per second

150 meters per second

1 foot per second

100 miles per hour

1 month

1 year

10 years

100 years

bipolar neurons

multipolar neurons

Purkinje neurons

pyramidal neurons

brains

spinal cord

all of the above

a nerve

stem cells

glial cells

muscle cells

prison cells