they help carry oxygen to different parts of your body

they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

wire

the brain

muscle

nerve

electrical impulses

telegraph

hormonal

proteins

1 year

100 years

1 month

10 years

all of the above

a nerve

spinal cord

brains

muscle cells

prison cells

stem cells

glial cells

Purkinje neurons

multipolar neurons

pyramidal neurons

bipolar neurons

1 meter per second

100 miles per hour

1 foot per second

150 meters per second

liver cells

muscle cells

stem cells

skin cells