Physical tests refer to tests that are not performed through instrumentation and laboratory tests. The usual laboratory tests, such as routine blood tests, blood sugar, and blood lipids, are performed through instrumentation and reagents. Physical examination is when the doctor examines the patient through his or her eyes, ears, nose, tongue, and mouth. For example, the lungs are auscultated with a stethoscope to see if there are any dry or wet rales, and if there is pneumonia, there may be blistering sounds. Also, when auscultating the heart, if there is mitral valve insufficiency, a murmur will be heard in the heart. So, many symptoms of the body can be detected by physical examination, and in some cases when there is an increase in the size of the liver, palpation of the liver will reveal that the liver is significantly enlarged under the ribs.