brains

a nerve

all of the above

spinal cord

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

prison cells

stem cells

muscle cells

glial cells

nerve

the brain

wire

muscle

100 years

10 years

1 year

1 month

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons

150 meters per second

1 foot per second

1 meter per second

100 miles per hour

telegraph

electrical impulses

proteins

hormonal

muscle cells

liver cells

skin cells

stem cells