muscle cells

skin cells

liver cells

stem cells

they do not have a nucleus

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they regenerate very quickly

Purkinje neurons

bipolar neurons

multipolar neurons

pyramidal neurons

hormonal

proteins

telegraph

electrical impulses

1 year

1 month

100 years

10 years

glial cells

muscle cells

stem cells

prison cells

spinal cord

a nerve

brains

all of the above

1 meter per second

1 foot per second

150 meters per second

100 miles per hour

nerve

muscle

wire

the brain