You can also see that it starts in theĪbdominal cavity, alongside the aorta, caudal to the kidneys.Īorta: Go back to the heart and follow the aortic arch. You can easily see it between the liver and the heart. This vessel returns blood to the right atrium of the heart from the lower body region. Posterior Vena Cava : Carefully lift the heart so that you can see the Posterior Vena Cava. Fetal pig heart, dorsal/right side view ofĬranial and caudal venae cava e Lower Veins and Arteries: Fetal pig heart, ventral/cranial view of major arteries.įigure 7. Observe the dorsal side of the heart, note the cranial vena cava and caudal vena cava entering the right atrium.įigure 6. (The ductusĪrteriosus eventually becomes a ligament in the adult). At birth, the ductusĪrteriosus closes and the blood travels to the lungs to get oxygenated. This is a part ofįetal circulation (fetal pigs are not breathing with lungs yet). The function of theĭuctus arteriosus is to divert blood to the aorta during fetal development. The top part of the pig’s left lung to view the structures more easily. Left lung and to see the ductus arteriosus, which connects to the aorta. ContinueĬleaning and following the pulmonary artery to reveal the branch that carries blood to theįigure 5. Dorsal and slightly cranial to the pulmonary artery find the aortic arch. You will have to carefully “trace and follow” vessels as youĬlean. Using tweezers, cleanĪround the pulmonary artery. See coronary arteries and veins on the surface of the heart.įind the pulmonary artery, the big artery leaving the right ventricle. Identify the Left and Right Auricles (atria) and the Left and Right Ventricles. Be careful, do not remove the auricles (look like “ears”) of the atria that are on Pericardial sac and covered with Thymus gland. The heart of your pig may still be enclosed in the Diagram of mammalian heart from the text Exercise 3: Dissection of the Fetal Pig: Circulatory System The Heart and affiliated Blood Vessels: (Tri cuspid AV valve) (Bicuspid AV valve)įigure 1. Use figures 42 and 42 of your text to help you. You will be responsible for knowing the following structures on the heart model (located
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