hormonal

telegraph

electrical impulses

proteins

pyramidal neurons

multipolar neurons

bipolar neurons

Purkinje neurons

stem cells

muscle cells

glial cells

prison cells

150 meters per second

100 miles per hour

1 meter per second

1 foot per second

100 years

1 year

10 years

1 month

they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

wire

muscle

the brain

nerve

stem cells

muscle cells

liver cells

skin cells

spinal cord

all of the above

a nerve

brains