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

1 foot per second

150 meters per second

100 miles per hour

1 meter per second

liver cells

skin cells

stem cells

muscle cells

1 year

1 month

10 years

100 years

pyramidal neurons

Purkinje neurons

multipolar neurons

bipolar neurons

stem cells

prison cells

glial cells

muscle cells

all of the above

brains

spinal cord

a nerve

hormonal

telegraph

electrical impulses

proteins

muscle

nerve

wire

the brain