Understanding laboratory tests -- Hematology tests -- Electrolytes -- Arterial blood gases test -- Liver blood tests -- Cardiac enzymes and cardiac markers tests -- Serologic tests -- Endocrine tests -- Tumor markers -- Pregnancy, infertility and genetic tests -- Simple X-ray imaging -- Computed tomography scan -- Magnetic resonance imaging and Positron emission tomography scan -- Ultrasound scan -- Cardiovascular tests and procedures -- Female and maternity tests and procedures -- Tests for males -- Lung, chest, abdominal, urinary tract tests and procedures -- Skin, muscle and bone tests -- Sinus, ears, nose, throat (ENT) tests and procedures -- Vision tests and procedures.