proteins

hormonal

electrical impulses

telegraph

glial cells

prison cells

muscle cells

stem cells

pyramidal neurons

Purkinje neurons

bipolar neurons

multipolar neurons

a nerve

all of the above

spinal cord

brains

nerve

wire

the brain

muscle

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they regenerate very quickly

they do not have a nucleus

stem cells

muscle cells

skin cells

liver cells

150 meters per second

1 meter per second

100 miles per hour

1 foot per second

100 years

1 month

1 year

10 years