The heart is a muscle! A BIG MUSCLE! It isn't like the other muscles in the body because it is the thing that keeps you going. This is the one muscle you don't wanna tear ;)
cardiac muscle
No
Only on Wikianswers.
femur
No
the gluteals
its your carve mucsle
age and muscle mass
hamstring
I think it is 'Anaerobic'.
they are cells that muscles use to store nutrients
an air scoop.