electrical impulses

proteins

hormonal

telegraph

prison cells

glial cells

stem cells

muscle cells

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

they regenerate very quickly

1 meter per second

1 foot per second

100 miles per hour

150 meters per second

liver cells

skin cells

muscle cells

stem cells

10 years

100 years

1 year

1 month

spinal cord

a nerve

brains

all of the above

the brain

wire

muscle

nerve

pyramidal neurons

Purkinje neurons

bipolar neurons

multipolar neurons