Male human anatomy cut in the sagittal plane. This computer generated image is based on segmented human data. Smooth muscle of the intestines, rectum, ureters, and bladder is visible. Cardiac muscle separate the chambers of the heart. Connected to the left ventricle is the aorta, a large vessel that carries blood into the body. The heart sits on top of the diaphragm, a thin sheet of muscle that separates the thoracic cavity from the abdominal cavity. The liver is situated just below the diaphragm and above the transverse colon and pancreas.