they regenerate very quickly

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they do not have a nucleus

wire

muscle

nerve

the brain

1 year

1 month

10 years

100 years

hormonal

telegraph

electrical impulses

proteins

liver cells

stem cells

muscle cells

skin cells

Purkinje neurons

multipolar neurons

pyramidal neurons

bipolar neurons

prison cells

glial cells

muscle cells

stem cells

a nerve

all of the above

spinal cord

brains

1 foot per second

1 meter per second

100 miles per hour

150 meters per second