they help carry oxygen to different parts of your body

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

muscle

the brain

wire

nerve

1 foot per second

150 meters per second

1 meter per second

100 miles per hour

muscle cells

stem cells

liver cells

skin cells

bipolar neurons

Purkinje neurons

pyramidal neurons

multipolar neurons

a nerve

all of the above

spinal cord

brains

1 year

10 years

100 years

1 month

hormonal

electrical impulses

proteins

telegraph

glial cells

stem cells

prison cells

muscle cells