electrical impulses

hormonal

telegraph

proteins

stem cells

muscle cells

skin cells

liver cells

100 miles per hour

1 meter per second

150 meters per second

1 foot per second

the brain

muscle

wire

nerve

1 year

100 years

10 years

1 month

bipolar neurons

Purkinje neurons

pyramidal neurons

multipolar neurons

brains

spinal cord

a nerve

all of the above

prison cells

glial cells

muscle cells

stem cells

they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body