they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

skin cells

stem cells

liver cells

muscle cells

nerve

muscle

the brain

wire

brains

all of the above

a nerve

spinal cord

100 miles per hour

150 meters per second

1 foot per second

1 meter per second

10 years

1 year

1 month

100 years

hormonal

electrical impulses

telegraph

proteins

pyramidal neurons

Purkinje neurons

multipolar neurons

bipolar neurons

muscle cells

glial cells

prison cells

stem cells