they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

hormonal

telegraph

proteins

electrical impulses

stem cells

prison cells

glial cells

muscle cells

100 years

1 month

10 years

1 year

150 meters per second

100 miles per hour

1 foot per second

1 meter per second

nerve

the brain

muscle

wire

pyramidal neurons

multipolar neurons

Purkinje neurons

bipolar neurons

spinal cord

brains

all of the above

a nerve

muscle cells

liver cells

skin cells

stem cells