mucles

1)    Each muscle made out of long thin cells.

2)    Which are called muscle fiber?

3)    Depending on function muscles come in different sizes.

4)    Like people muscles need to relax.

5)    Muscle fibers are highly specialized.

Torso

6)    Body torso consist of two parts the chest and the abdomen.

7)    Chest contains heart and lungs.

8)    Abdomen contains the digestive and urinary systems.

9)    Chest and abdomen are separated.

10)                       Caused by the diaphragm.