brains

spinal cord

a nerve

all of the above

stem cells

skin cells

liver cells

muscle cells

they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

they help carry oxygen to different parts of your body

nerve

the brain

wire

muscle

electrical impulses

telegraph

proteins

hormonal

multipolar neurons

pyramidal neurons

bipolar neurons

Purkinje neurons

1 foot per second

1 meter per second

100 miles per hour

150 meters per second

1 month

10 years

100 years

1 year

muscle cells

stem cells

prison cells

glial cells