they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

150 meters per second

1 foot per second

100 miles per hour

1 meter per second

liver cells

skin cells

muscle cells

stem cells

Purkinje neurons

bipolar neurons

pyramidal neurons

multipolar neurons

hormonal

telegraph

proteins

electrical impulses

nerve

wire

the brain

muscle

glial cells

muscle cells

prison cells

stem cells

100 years

10 years

1 year

1 month

spinal cord

all of the above

a nerve

brains