1 meter per second

100 miles per hour

150 meters per second

1 foot per second

hormonal

proteins

electrical impulses

telegraph

skin cells

liver cells

muscle cells

stem cells

they do not have a nucleus

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

nerve

muscle

the brain

wire

100 years

1 month

10 years

1 year

pyramidal neurons

multipolar neurons

bipolar neurons

Purkinje neurons

stem cells

muscle cells

prison cells

glial cells

spinal cord

a nerve

all of the above

brains