they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

muscle

the brain

nerve

wire

muscle cells

liver cells

skin cells

stem cells

all of the above

brains

spinal cord

a nerve

150 meters per second

100 miles per hour

1 foot per second

1 meter per second

muscle cells

prison cells

stem cells

glial cells

bipolar neurons

multipolar neurons

Purkinje neurons

pyramidal neurons

1 year

100 years

1 month

10 years

proteins

hormonal

electrical impulses

telegraph