hormonal

proteins

electrical impulses

telegraph

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons

liver cells

muscle cells

stem cells

skin cells

150 meters per second

1 foot per second

1 meter per second

100 miles per hour

all of the above

a nerve

spinal cord

brains

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

they regenerate very quickly

glial cells

muscle cells

prison cells

stem cells

the brain

muscle

wire

nerve

10 years

1 year

100 years

1 month