hormonal

proteins

telegraph

electrical impulses

prison cells

stem cells

muscle cells

glial cells

pyramidal neurons

bipolar neurons

multipolar neurons

Purkinje neurons

they are very long compared to other cells in the body

they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body

brains

spinal cord

all of the above

a nerve

muscle cells

stem cells

skin cells

liver cells

1 year

1 month

100 years

10 years

1 meter per second

100 miles per hour

150 meters per second

1 foot per second

wire

muscle

nerve

the brain