muscle cells

skin cells

stem cells

liver cells

electrical impulses

hormonal

proteins

telegraph

1 year

100 years

10 years

1 month

they do not have a nucleus

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they regenerate very quickly

spinal cord

all of the above

brains

a nerve

1 meter per second

1 foot per second

150 meters per second

100 miles per hour

wire

muscle

the brain

nerve

pyramidal neurons

bipolar neurons

multipolar neurons

Purkinje neurons

glial cells

muscle cells

stem cells

prison cells