skin cells

muscle cells

stem cells

liver cells

they do not have a nucleus

they help carry oxygen to different parts of your body

they regenerate very quickly

they are very long compared to other cells in the body

a nerve

all of the above

brains

spinal cord

150 meters per second

100 miles per hour

1 foot per second

1 meter per second

glial cells

stem cells

prison cells

muscle cells

1 year

100 years

1 month

10 years

wire

muscle

the brain

nerve

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons

hormonal

telegraph

electrical impulses

proteins