skin cells

muscle cells

liver cells

stem cells

proteins

electrical impulses

hormonal

telegraph

all of the above

brains

spinal cord

a nerve

1 foot per second

100 miles per hour

150 meters per second

1 meter per second

nerve

the brain

wire

muscle

bipolar neurons

multipolar neurons

pyramidal neurons

Purkinje neurons

prison cells

muscle cells

glial cells

stem cells

1 month

100 years

10 years

1 year

they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body