To test your knowledge, discuss the following topics with a study partner or in writing, ideally from memory.
23.1 Overview of the Respiratory System
1. The multiple functions of the respiratory system

To determine:
The multiple functions of the respiratory system.
Introduction:
The organ system that provides oxygen to the blood by the process of inhalation and removes carbon dioxide by the process of exhalation is called the respiratory system. It involves organs like nose, pharynx, larynx trachea, and bronchi.
Explanation of Solution
The functions of the respiratory system are as follows:
- Respiratory system act as a system that helps in the exchange of gases between blood and air.
- It also helps in creating sounds such as speech, crying, and laughing.
- The respiratory system has some cells that provide a sense of smell and also remember the smell.
- It also maintains the pH of body fluid.
- Lungs help in the synthesis of angiotensin II, which regulates the blood pressure.
- It produces platelets in the lungs.
- It helps in maintaining metabolism.
Thus, the respiratory system performs different functions.
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