telegraph

proteins

hormonal

electrical impulses

150 meters per second

1 foot per second

100 miles per hour

1 meter per second

10 years

1 year

1 month

100 years

muscle cells

liver cells

stem cells

skin cells

prison cells

glial cells

stem cells

muscle cells

multipolar neurons

pyramidal neurons

bipolar neurons

Purkinje neurons

a nerve

brains

spinal cord

all of the above

muscle

nerve

wire

the brain

they are very long compared to other cells in the body

they do not have a nucleus

they help carry oxygen to different parts of your body

they regenerate very quickly