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

muscle cells

skin cells

liver cells

stem cells

hormonal

proteins

telegraph

electrical impulses

all of the above

spinal cord

brains

a nerve

150 meters per second

1 meter per second

100 miles per hour

1 foot per second

wire

nerve

the brain

muscle

bipolar neurons

Purkinje neurons

pyramidal neurons

multipolar neurons

1 month

10 years

100 years

1 year

muscle cells

prison cells

stem cells

glial cells