Final answer:
The physiological hernia during the 6th week of development refers to the temporary protrusion of intestinal loops into the umbilical cord, a normal part of embryonic growth.
Step-by-step explanation:
The physiological hernia that happens around the 6th week of development is an event where the intestinal loops begin to bulge out into the umbilical cord because the gastrointestinal system develops too rapidly to be contained within the embryonic abdomen. This herniation is a normal part of the embryonic growth, and eventually, as development progresses, the intestines will return into the abdominal cavity. During this same period, elaborate morphological changes occur, such as the formation of fingers and toes through apoptosis, the development of facial structures, and the beginnings of ossification in the embryonic skeleton.