muscle cells

liver cells

stem cells

skin cells

muscle

the brain

wire

nerve

they do not have a nucleus

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

electrical impulses

hormonal

proteins

telegraph

10 years

1 month

100 years

1 year

1 meter per second

150 meters per second

1 foot per second

100 miles per hour

a nerve

brains

all of the above

spinal cord

multipolar neurons

bipolar neurons

pyramidal neurons

Purkinje neurons

stem cells

glial cells

prison cells

muscle cells