Use the Following Information to Answer the Question

question 32

Multiple Choice

Use the following information to answer the question.
Due to its system of air sacs connected to the lungs, the respiratory system of birds is arguably the most effective respiratory system of all air-breathers. Upon inhalation, air first flows into posterior air sacs, then into the lungs, and then into anterior air sacs on the way to being exhaled. Thus, there is one-way flow of air through the lungs, along thousands of tubules called parabronchi.
If the inner lining of the air sacs is neither thin nor highly vascularized, then what can be inferred about the air sacs?

• A) They must not belong to the respiratory system.
• B) They cannot be derived from endoderm.
• C) They are not efficient sites of gas exchange between air and blood.
• D) They cannot effectively moisturize the air before it reaches the lungs.

---

Definitions:

Catholic Viewpoint

Perspectives, beliefs, or doctrines of the Roman Catholic Church, including its teachings on moral, theological, and societal issues.

Protestant Viewpoint

A perspective or belief system within Christianity that originated with the Reformation, challenging the authority and practices of the Catholic Church and emphasizing the importance of scripture and faith.

Nineteenth Century

The period of time from 1801 to 1900, known for industrialization and modernization.

Moral Order

represents the set of shared values, norms, and expectations that guide behavior and maintain cohesion within a society.