Some of the embryo's intestines remain within the umbilical cord during the embryonic period.What is the rationale for this development of the gastrointestinal system?
A) Umbilical cord is much larger at this time than it will be at the end of pregnancy.
B) Intestines begin their development within the umbilical cord.
C) Nutrient content of the blood is higher in this location.
D) Abdomen is too small to contain all the organs while they are developing.

Question

Quizplus · Accepted Answer

The abdominal contents grow more rapidly than the abdominal cavity; therefore,part of their development takes place in the umbilical cord.By 10 weeks of gestation,the abdomen is large enough to contain them.Intestines begin their development within the umbilical cord but only because the liver and kidneys occupy most of the abdominal cavity.Blood supply is adequate in all areas.

Some of the Embryo's Intestines Remain Within the Umbilical Cord