telegraph

proteins

hormonal

electrical impulses

all of the above

a nerve

spinal cord

brains

pyramidal neurons

bipolar neurons

multipolar neurons

Purkinje neurons

stem cells

muscle cells

skin cells

liver cells

100 miles per hour

1 meter per second

150 meters per second

1 foot per second

muscle

wire

the brain

nerve

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

they regenerate very quickly

10 years

100 years

1 year

1 month

glial cells

prison cells

muscle cells

stem cells