prison cells

muscle cells

glial cells

stem cells

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

muscle cells

stem cells

skin cells

liver cells

all of the above

a nerve

brains

spinal cord

100 years

1 month

1 year

10 years

Purkinje neurons

bipolar neurons

multipolar neurons

pyramidal neurons

electrical impulses

telegraph

proteins

hormonal

nerve

the brain

muscle

wire

150 meters per second

1 foot per second

1 meter per second

100 miles per hour