What is between individuals who are not identical twins A Isegratt B. Xenograft C. Allograft D. autograft 39. When the diaphragm and external intercostal muscles contract, which of the following action does not occur? A Air moves into the lungs B. The intrapulmonary pressure decreases C. The volume of the thoracic cavity increases D. The diaphragm moves interiorly E The intraplesical pressure increases