The respiratory system review
|Respiratory system||The body system responsible for gas exchange between the body and the external environment|
|Pharynx (throat)||Tube connected the nose/mouth to the esophagus|
|Larynx (voice box)||Tube forming a passage between the pharynx and trachea|
|Trachea||Tube connecting the larynx to the bronchi of the lungs|
|Bronchi||Branches of tissue stemming from the trachea|
|Bronchiole||Airway that extends from the bronchus|
|Alveoli||Structures of the lung where gas exchange occurs|
|Diaphragm||Thoracic muscle that lays beneath the lungs and aids in inhalation/exhalation|
The respiratory system
Common mistakes and misconceptions
- Physiological respiration and cellular respiration are not the same. People sometimes use the word "respiration" to refer to the process of cellular respiration, which is a cellular process in which carbohydrates are converted into energy. The two are related processes, but they are not the same.
- We do not breathe in only oxygen or breathe out only carbon dioxide. Often the terms "oxygen" and "air" are used interchangeably. It is true that the air we breathe in has more oxygen than the air we breathe out, and the air we breathe out has more carbon dioxide than the air that we breathe in. However, oxygen is just one of the gases found in the air we breathe. (In fact, the air has more nitrogen than oxygen!)
- The respiratory system does not work alone in transporting oxygen through the body. The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.