liver cells

stem cells

skin cells

muscle cells

10 years

1 year

1 month

100 years

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

spinal cord

a nerve

all of the above

brains

multipolar neurons

Purkinje neurons

pyramidal neurons

bipolar neurons

the brain

muscle

wire

nerve

glial cells

muscle cells

prison cells

stem cells

telegraph

electrical impulses

proteins

hormonal

150 meters per second

100 miles per hour

1 meter per second

1 foot per second