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

they do not have a nucleus

nerve

wire

muscle

the brain

glial cells

prison cells

muscle cells

stem cells

1 meter per second

100 miles per hour

150 meters per second

1 foot per second

1 year

100 years

1 month

10 years

skin cells

stem cells

liver cells

muscle cells

all of the above

spinal cord

a nerve

brains

bipolar neurons

multipolar neurons

pyramidal neurons

Purkinje neurons

telegraph

electrical impulses

hormonal

proteins