they are very long compared to other cells in the body

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

1 year

100 years

1 month

10 years

stem cells

liver cells

muscle cells

skin cells

pyramidal neurons

Purkinje neurons

multipolar neurons

bipolar neurons

1 meter per second

100 miles per hour

1 foot per second

150 meters per second

muscle

the brain

nerve

wire

glial cells

muscle cells

stem cells

prison cells

spinal cord

a nerve

brains

all of the above

electrical impulses

proteins

telegraph

hormonal