electrical impulses

telegraph

proteins

hormonal

Purkinje neurons

pyramidal neurons

multipolar neurons

bipolar neurons

stem cells

liver cells

skin cells

muscle cells

100 years

10 years

1 year

1 month

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

glial cells

muscle cells

prison cells

stem cells

100 miles per hour

1 meter per second

150 meters per second

1 foot per second

muscle

the brain

wire

nerve

brains

all of the above

spinal cord

a nerve