brains

all of the above

a nerve

spinal cord

1 meter per second

150 meters per second

100 miles per hour

1 foot per second

hormonal

electrical impulses

telegraph

proteins

skin cells

liver cells

stem cells

muscle cells

1 year

100 years

1 month

10 years

Purkinje neurons

bipolar neurons

pyramidal neurons

multipolar neurons

prison cells

muscle cells

glial cells

stem cells

wire

the brain

nerve

muscle

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

they regenerate very quickly