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

hormonal

proteins

telegraph

electrical impulses

1 year

1 month

10 years

100 years

skin cells

liver cells

muscle cells

stem cells

the brain

nerve

wire

muscle

all of the above

brains

spinal cord

a nerve

muscle cells

glial cells

stem cells

prison cells

150 meters per second

100 miles per hour

1 foot per second

1 meter per second

bipolar neurons

Purkinje neurons

pyramidal neurons

multipolar neurons