liver cells

skin cells

muscle cells

stem cells

1 foot per second

100 miles per hour

150 meters per second

1 meter per second

the brain

wire

nerve

muscle

they help carry oxygen to different parts of your body

they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

multipolar neurons

bipolar neurons

Purkinje neurons

pyramidal neurons

muscle cells

prison cells

glial cells

stem cells

a nerve

all of the above

brains

spinal cord

1 year

100 years

10 years

1 month

proteins

electrical impulses

hormonal

telegraph