electrical impulses

proteins

telegraph

hormonal

1 month

1 year

10 years

100 years

the brain

nerve

wire

muscle

stem cells

skin cells

liver cells

muscle cells

Purkinje neurons

multipolar neurons

pyramidal neurons

bipolar neurons

they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

100 miles per hour

1 meter per second

150 meters per second

1 foot per second

muscle cells

stem cells

prison cells

glial cells

spinal cord

all of the above

a nerve

brains