Which ONE of the following statements regarding the ligamentum arteriosum is CORRECT?

Question

BlackTom AI · Accepted Answer

Exploring the anatomy in question:
Option 1: 'It provides a shunt between the pulmonary trunk and aorta in foetal life.' This is the classic function of the ductus arteriosus, which becomes the ligamentum arteriosum after birth. The statement correctly describes the foetal shunt that diverts blood away from the fluid-filled lungs.
Option 2: 'It is the remains of the fossa ovalis' The fossa ovalis is the remnant of the foramen ovale in the interatrial septum, not related to the ductus arteriosus or ligamentum arteriosum. This choice confuses two different fetal structures.
Option 3: 'The right recurrent laryngeal nerve hooks around it' In reality, the right recurrent laryngeal nerve hooks around the right subclavian artery, not the ligamentum arteriosum. The left recurrent laryngeal nerve, however, passes close to the ligamentum arteriosum as it loops under the aortic arch, so this statement misidentifies which nerve interacts with the region.
Option 4: 'It is located on the superior surface of the aortic arch' The ligamentum arteriosum lies near the aortic arch but is not described as being on the 'superior surface' of the arch in standard anatomical terms; its relevant relationship is between the arch, left pulmonary artery, and the ductus/ligamentum connecting them. Describing it as on the superior surface is imprecise and misleading.
Overall, the only option that accurately captures the established foetal function of the ductus arteriosus (becoming the ligamentum arteriosum after birth) is the statement about providing a shunt between the pulmonary trunk and aorta in foetal life.

Which ONE of the following statements regarding the ligamentum arteriosum is CORRECT?单项选择题

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