hormonal

telegraph

proteins

electrical impulses

they regenerate very quickly

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

stem cells

glial cells

prison cells

muscle cells

100 years

1 month

1 year

10 years

spinal cord

brains

a nerve

all of the above

pyramidal neurons

bipolar neurons

Purkinje neurons

multipolar neurons

nerve

wire

muscle

the brain

100 miles per hour

1 foot per second

150 meters per second

1 meter per second

muscle cells

skin cells

stem cells

liver cells