liver cells

skin cells

muscle cells

stem cells

they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

a nerve

brains

spinal cord

all of the above

1 foot per second

150 meters per second

100 miles per hour

1 meter per second

100 years

1 month

1 year

10 years

Purkinje neurons

bipolar neurons

multipolar neurons

pyramidal neurons

nerve

muscle

wire

the brain

muscle cells

stem cells

prison cells

glial cells

electrical impulses

telegraph

hormonal

proteins