The heart, and the proximal ends of the large blood vessels to which it attaches, are enclosed in a membranous sac called the ______.Multiple choice question.myocardiumpericardiummediastinum

The heart is located in the ______ and is ______ to the diaphragm.Multiple choice question.mediastinum; inferiormediastinum; superiorabdominal cavity; superiorthoracic cavity; inferior

The extraembryonic membrane that contributes blood vessels for the formation of the umbilical cord in mammals is the Blank______.Multiple choice question.allantoischorionamnionyolk sac

Blood from the superior and inferior vena cavae and the coronary sinus flow into the ______.Multiple choice question.right atriumsystemic circuitaortaleft atrium

The membrane that adheres to the wall of the thoracic cavity is the Blank______.Multiple choice question.visceral pleuraparietal pleuravisceral peritoneumparietal peritoneum

Blood leaving the right ventricle flows into the ______.Multiple choice question.right atriaaortaleft ventriclepulmonary trunk