electrical impulses

hormonal

proteins

telegraph

Purkinje neurons

pyramidal neurons

bipolar neurons

multipolar neurons

muscle cells

prison cells

stem cells

glial cells

they help carry oxygen to different parts of your body

they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

a nerve

brains

spinal cord

all of the above

1 foot per second

150 meters per second

100 miles per hour

1 meter per second

stem cells

muscle cells

liver cells

skin cells

100 years

10 years

1 month

1 year

wire

the brain

muscle

nerve