skin cells

muscle cells

liver cells

stem cells

proteins

telegraph

hormonal

electrical impulses

brains

spinal cord

a nerve

all of the above

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

they do not have a nucleus

100 miles per hour

150 meters per second

1 meter per second

1 foot per second

multipolar neurons

Purkinje neurons

pyramidal neurons

bipolar neurons

muscle cells

prison cells

stem cells

glial cells

1 month

10 years

1 year

100 years

nerve

the brain

muscle

wire