they are very long compared to other cells in the body

they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body

muscle cells

liver cells

stem cells

skin cells

100 years

1 year

10 years

1 month

hormonal

proteins

electrical impulses

telegraph

1 foot per second

150 meters per second

100 miles per hour

1 meter per second

muscle

wire

the brain

nerve

spinal cord

a nerve

all of the above

brains

multipolar neurons

pyramidal neurons

bipolar neurons

Purkinje neurons

glial cells

stem cells

prison cells

muscle cells