ANA 407 Lecture Notes - Lecture 23: Round Ligament Of Liver, Ductus Arteriosus, Ductus Venosus

• School: University at Buffalo
• Department: Anatomical Sciences
• Course: ANA 407
• Professor: Karnes

Document Summary

1. limbs the b. c. d. e. f. g. h. i. j. k. l. Describe the fetal circulation by listing in sequence, the major structures through which blood passes as it passes from placenta to fetus and back to placenta. Ductus arteriosus (only a small amount of blood passes from pulmonary a. into inactive lungs). Note that the ductus arteriosus connects at the. distal part of the aortic arch, so fetal blood that has already served the head and upper limbs will tend to continue into the descending aorta. After birth, the ductus arteriosus becomes the ligamentum arteriosum. aorta umbilical aa. Are branches of the internal iliac aa. [of course, some blood continues into lower limbs and abdominal/pelvic viscera via branches from the aorta. ] After birth, the umbilical aa. form ridges (medial umbilical ligaments) placenta. Describe the pericardium and the surface anatomy of the heart. a. The pericardium is a double walled sac that encloses the heart and great vessels.