telegraph

electrical impulses

proteins

hormonal

stem cells

muscle cells

skin cells

liver cells

1 meter per second

1 foot per second

100 miles per hour

150 meters per second

spinal cord

all of the above

a nerve

brains

bipolar neurons

multipolar neurons

Purkinje neurons

pyramidal neurons

nerve

muscle

the brain

wire

prison cells

glial cells

stem cells

muscle cells

they do not have a nucleus

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

100 years

10 years

1 year

1 month