back muscle
Your heart is located behind the sternum and between the lungs.
In your chest and behind your ribcage.
The muscle is the diaphram and it is located just beneath your lungs.
Smooth muscle located in the lungs
behind the lungs in the rib cage
Heart
Esophagus is located on the back side of the trachea in your thorax.
The muscle is the "diaphragm" muscle. It is located beneath the lungs. When it moves down and away, it creates lower pressure around the lungs, and the air pressure outside the body flows into the lungs. When it moves up and in, it compresses the lungs, increasing the pressure to force the air back out.
Aortic valve
Behind the lungs on the left side of the ruminant.
The thymus is the lymphatic organ located behind the sternum.
diaphragm