Which structure connects the pulmonary trunk to the aorta in the fetal circulation of domestic mammals?
Correct answer: C. Ductus arteriosus
- A. Foramen ovale
- B. Ductus venosus
- C. Ductus arteriosus
- D. Umbilical vein
Explanation
The ductus arteriosus diverts fetal blood from the pulmonary trunk into the aorta because the fetal lungs are not yet functioning for gas exchange. The foramen ovale instead connects the right and left atria.
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Covers the gross and microscopic structure of domestic animals, including bones, joints, muscles, organs, blood vessels and nerves. It explains how the respiratory, cardiovascular, digestive, urinary, nervous, endocrine and reproductive systems function, with attention to species differences and the relationship between anatomical structure and physiological processes.
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