Following its physiological and anatomical closure after birth, the depression left by the closed foramen ovale in the interatrial septum is known as the:

What is the expected target preductal oxygen saturation (SpO2) in a healthy full-term newborn at 1 minute of life?

A newborn is found to have a single umbilical artery (SUA). This finding is commonly associated with congenital anomalies in which organ system?