brains

all of the above

a nerve

spinal cord

hormonal

electrical impulses

proteins

telegraph

muscle cells

prison cells

glial cells

stem cells

1 meter per second

150 meters per second

100 miles per hour

1 foot per second

liver cells

skin cells

stem 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

wire

the brain

muscle

nerve

pyramidal neurons

bipolar neurons

multipolar neurons

Purkinje neurons

1 year

1 month

10 years

100 years