muscle

the brain

wire

nerve

muscle cells

liver cells

skin cells

stem cells

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons

electrical impulses

proteins

telegraph

hormonal

prison cells

muscle cells

glial cells

stem cells

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

150 meters per second

1 meter per second

1 foot per second

100 miles per hour

100 years

10 years

1 year

1 month

spinal cord

all of the above

a nerve

brains