Respiratory System

2. under your ribs
6. Gas exchange is the process by which O2 in the air is exchanged for CO2 in the bloodstream
8. structure made mainly of cartilage that connects the pharynx and trachea and serves as a passageway for air and for the production of sound
10. The respiratory system functions in the exchange of gases between body cells and the environment
11. situated between the ribs.
13. the normal pathway for air to enter and exit the respiratory system
15. also known as the throat, is the region at the back of nose & mouth
16. a network of tubes that conduct air into the lungs

1. Breathing, also called ventilation, is the process of moving air into and out of the lungs to reach alveoli
3. In order to live, humans produce energy by a process called respiration
4. The lungs contain over 500 million which are microscopic air sacs at the ends of the bronchioles
5. Inspiration brings air into the lungs by increasing the volume of the thorax
7. Expiration lets air flow out of the lungs by decreasing the volume of the thorax
9. also known as the windpipe, is a 4-5 inch long rigid tube that carries air from the larynx to the bronchial tree of the lungs
12. a pair of soft, cone-shaped organs that occupy most of the space in the thoracic cavity
14. The cardiovascular system works with the respiratory system to transport O2 from the lungs to body cells and returns CO2 from body cells to the lungs for removal