RESPIRATORY SYSTEM

5. 500 ml of air volume is moved in/out of lungs with each breath.
7. It is the superior portion of the pharynx that lies posterior to the nasal cavity and extends to the soft palate.
9. Air volume that actually reaches the respiratory zone.
12. It is the air volume remaining in lung after expiration that allows gas exchange to go on continuously, even between breaths, and helps keep alveoli open (inflated.
13. Terminal bronchioles lead into this zone structures and terminate in alveoli.

1. It is a complex mixture of phospholipids and lipoproteins that lowers the surface tension of the alveolar fluid.
2. It is a large space in the anterior aspect of the skull that lies inferior to the nasal bone and superior to the oral cavity; it is lined with muscle and mucous membrane.
3. Respiratory sound produced by air rushing through large passageways such as the trachea and bronchi.
4. What divides each lung into sections called lobes.
6. It is a short passageway that lies in the midline of the neck anterior to the esophagus and the fourth through sixth cervical vertebrae (C4–C6). It is also known as the "voice box".
7. It divides the nasal cavity into right and left sides.
8. It is a specialized organ at the entrance of the respiratory system that consists of a visible external portion and an internal portion inside the skull called the nasal cavity.
10. They are a paired cone-shaped organs in the thoracic cavity. They are separated from each other by the heart and other structures of the mediastinum, which divides the thoracic cavity into two anatomically distinct chambers.
11. Respiratory breathing sounds characterized soft sounds of air filling alveoli.
14. A laryngeal cartilage consists of two fused plates of hyaline cartilage that form the anterior wall of the larynx and give it a triangular shape. Also known as the Adam's apple.