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

150 meters per second

1 meter per second

1 foot per second

100 miles per hour

a nerve

brains

spinal cord

all of the above

nerve

the brain

wire

muscle

proteins

electrical impulses

telegraph

hormonal

glial cells

stem cells

prison cells

muscle cells

liver cells

skin cells

stem cells

muscle cells

multipolar neurons

bipolar neurons

Purkinje neurons

pyramidal neurons

1 month

1 year

10 years

100 years