they help carry oxygen to different parts of your body

they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

muscle cells

liver cells

stem cells

skin cells

1 month

1 year

100 years

10 years

pyramidal neurons

multipolar neurons

bipolar neurons

Purkinje neurons

spinal cord

brains

a nerve

all of the above

electrical impulses

telegraph

proteins

hormonal

stem cells

glial cells

muscle cells

prison cells

muscle

nerve

wire

the brain

1 foot per second

100 miles per hour

1 meter per second

150 meters per second