1 year

10 years

1 month

100 years

muscle

wire

nerve

the brain

electrical impulses

hormonal

telegraph

proteins

stem cells

muscle cells

liver cells

skin cells

1 meter per second

100 miles per hour

1 foot per second

150 meters per second

they do not have a nucleus

they regenerate very quickly

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

bipolar neurons

pyramidal neurons

Purkinje neurons

multipolar neurons

spinal cord

all of the above

a nerve

brains

stem cells

prison cells

glial cells

muscle cells