skin cells

stem cells

muscle cells

liver cells

1 year

10 years

1 month

100 years

brains

spinal cord

a nerve

all of the above

bipolar neurons

multipolar neurons

Purkinje neurons

pyramidal neurons

muscle

nerve

the brain

wire

telegraph

proteins

electrical impulses

hormonal

100 miles per hour

150 meters per second

1 foot per second

1 meter per second

stem cells

prison cells

glial cells

muscle cells

they do not have a nucleus

they are very long compared to other cells in the body

they regenerate very quickly

they help carry oxygen to different parts of your body