electrical impulses

telegraph

hormonal

proteins

1 foot per second

100 miles per hour

1 meter per second

150 meters per second

10 years

100 years

1 month

1 year

muscle

wire

the brain

nerve

stem cells

prison cells

muscle cells

glial cells

they are very long compared to other cells in the body

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

muscle cells

skin cells

stem cells

liver cells

multipolar neurons

bipolar neurons

pyramidal neurons

Purkinje neurons

a nerve

all of the above

spinal cord

brains