Question Detail
Question
Which extraembryonic membrane is primarily involved in waste storage and gas exchange in some vertebrates?
Correct Answer
Option C is the correct answer.
Detailed Explanation
The allantois stores metabolic waste (uric acid) in reptiles and birds. In mammals, its blood vessels become the umbilical vessels, and it contributes to the placenta's function in gas exchange.
Hint
Think of it as a sac for waste and a source of blood vessels.