muscle cells

skin cells

liver cells

stem cells

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

they do not have a nucleus

wire

muscle

nerve

the brain

1 foot per second

1 meter per second

100 miles per hour

150 meters per second

telegraph

proteins

electrical impulses

hormonal

1 year

10 years

100 years

1 month

pyramidal neurons

Purkinje neurons

bipolar neurons

multipolar neurons

brains

all of the above

spinal cord

a nerve

glial cells

stem cells

prison cells

muscle cells