brains

spinal cord

a nerve

all of the above

stem cells

prison cells

muscle cells

glial cells

150 meters per second

100 miles per hour

1 meter per second

1 foot per second

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

they regenerate very quickly

bipolar neurons

Purkinje neurons

pyramidal neurons

multipolar neurons

muscle

the brain

nerve

wire

liver cells

stem cells

muscle cells

skin cells

proteins

hormonal

electrical impulses

telegraph

1 month

1 year

10 years

100 years