Gas Exchange

Question 1

From the nasal cavity, air passes through the ___________and_____________, as it makes its way to the trachea.

Answer 1

pharynx (throat) and the larynx (voice box)

Question 2

The main function of the __________is to funnel the inhaled air to the lungs and the exhaled air back out of the body.

Answer 2

trachea

Question 3

The____________ propel foreign particles trapped in the mucus toward the pharynx.

Answer 3

cilia

Question 4

The muscular___________, which facilitates breathing, is inferior to (below) the lungs and marks the end of the thoracic cavity.

Answer 4

diaphragm

Question 5

The respiratory_____________ subdivide into several alveolar ducts.

Answer 5

bronchioles

Question 6

Gas exchange occurs only in __________. They are made of thin-walled parenchymal cells, typically one-cell thick, that look like tiny bubbles within the sacs. They are in direct contact with capillaries (one-cell thick) of the circulatory system.

Answer 6

alveoli

Question 7

In the lungs, air is diverted into smaller and smaller passages, or_____________.

Answer 7

bronchi

Question 8

Each bronchus divides into secondary bronchi, then into tertiary bronchi, which in turn divide, creating smaller and smaller diameter _____________ as they split and spread through the lung.

Answer 8

bronchioles

Question 9

Which is the order of airflow during inhalation?

Answer 9

nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, alveoli (NPLTBBA)