liver cells

skin cells

stem cells

muscle cells

they are very long compared to other cells in the body

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

brains

all of the above

a nerve

spinal cord

telegraph

proteins

hormonal

electrical impulses

prison cells

glial cells

stem cells

muscle cells

wire

the brain

muscle

nerve

150 meters per second

1 meter per second

100 miles per hour

1 foot per second

Purkinje neurons

bipolar neurons

multipolar neurons

pyramidal neurons

10 years

1 month

1 year

100 years