100 years

1 year

10 years

1 month

they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

skin cells

stem cells

muscle cells

liver cells

telegraph

hormonal

proteins

electrical impulses

150 meters per second

100 miles per hour

1 foot per second

1 meter per second

glial cells

stem cells

muscle cells

prison cells

bipolar neurons

pyramidal neurons

Purkinje neurons

multipolar neurons

a nerve

spinal cord

brains

all of the above

muscle

the brain

wire

nerve