pulmonary artery the large artery originating from the superior surface of the right ventricle of the heart and carrying deoxygenated blood to the lungs for oxygenation; it starts as the pulmonary trunk, which divides between the fifth and sixth thoracic vertebrae to form the right pulmonary artery that enters the right lung and the left pulmonary ...
Expert witnesses may be subpoenaed (issued with a witness summons), although this is normally a formality to avoid court date clashes. In the United States, under the Federal Rule of Evidence 702 (FRE), an expert witness must be qualified on the topic of testimony.
In their place, Rule 601 presumes all witnesses competent to testify. Rules 602 and 603 require testifying fact witnesses to have personal knowledge of. the facts and be willing to take an oath or affirmation to tell the truth. Despite this. fairly low witness qualification standard, competency challenges do remain.