hormonal

telegraph

electrical impulses

proteins

muscle cells

stem cells

liver cells

skin cells

they do not have a nucleus

they regenerate very quickly

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons

100 years

10 years

1 year

1 month

glial cells

stem cells

prison cells

muscle cells

wire

muscle

nerve

the brain

1 foot per second

100 miles per hour

150 meters per second

1 meter per second

spinal cord

a nerve

all of the above

brains