1 year

10 years

1 month

100 years

muscle cells

stem cells

liver cells

skin cells

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

they regenerate very quickly

muscle cells

glial cells

prison cells

stem cells

muscle

nerve

wire

the brain

brains

spinal cord

all of the above

a nerve

telegraph

proteins

hormonal

electrical impulses

150 meters per second

1 foot per second

1 meter per second

100 miles per hour

pyramidal neurons

bipolar neurons

multipolar neurons

Purkinje neurons