The indirect Coombs' test is done on a sample of the liquid part of the blood. It detects antibodies that are present in the bloodstream and could bind to certain red blood cells and destroy them. A Coombs' test involves taking a sample of blood.
It is placed in the middle of the chest or thoracic cavity (middle mediastinum), posterior to the body of sternum and the second to sixth costal cartilages and anterior to the fifth to the eighth thoracic vertebrae.
The human heart is located in the center if the chest, between the lungs. However the apex (the lower point of the heart made by the ventricles) is toward the left side of the chest. just now. Report Abuse. The human heart is located in the center if the chest, between the lungs. However the apex (the lower point of the heart made by the ventricles) is toward the left side of the chest. That's often why, when you can you feel your heartbeat, it is in the left side of your chest.