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Questions and Answers
What is the primary function of the respiratory system?
What is the primary function of the respiratory system?
What is the tube that connects the nose and mouth to the lungs?
What is the tube that connects the nose and mouth to the lungs?
What is the muscle that helps with breathing and separates the chest cavity from the abdominal cavity?
What is the muscle that helps with breathing and separates the chest cavity from the abdominal cavity?
What happens during inhalation?
What happens during inhalation?
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What is the process by which oxygen and carbon dioxide are exchanged in the lungs?
What is the process by which oxygen and carbon dioxide are exchanged in the lungs?
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What is the role of the alveoli in the lungs?
What is the role of the alveoli in the lungs?
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Study Notes
Overview of the Respiratory System
- The respiratory system is a biological system that brings oxygen into the body and removes carbon dioxide.
- It is essential for cellular respiration and energy production.
Organs of the Respiratory System
- Nose and Mouth: air enters the body through the nose or mouth.
- Pharynx (Throat): air passes through the pharynx, which is a tube that connects the nose and mouth to the lungs.
- Larynx (Voice Box): air passes through the larynx, which contains the vocal cords.
- Trachea (Windpipe): air passes through the trachea, a tube that divides into two bronchi.
- Bronchi: tubes that branch off from the trachea and lead to the lungs.
- Lungs: organs that exchange oxygen and carbon dioxide through the process of respiration.
- Diaphragm: a dome-shaped muscle that separates the chest cavity from the abdominal cavity and helps with breathing.
Mechanism of Breathing
- Inhalation: diaphragm contracts, rib cage expands, and air enters the lungs.
- Exhalation: diaphragm relaxes, rib cage descends, and air leaves the lungs.
Gas Exchange
- Oxygen: enters the blood through the alveoli (small air sacs in the lungs) and binds to hemoglobin in red blood cells.
- Carbon Dioxide: leaves the blood through the alveoli and is exhaled out of the body.
Functions of the Respiratory System
- Brings oxygen into the body
- Removes carbon dioxide from the body
- Helps regulate pH levels in the body
- Plays a role in speech and vocalization
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Description
Test your knowledge of the respiratory system, its organs, mechanism of breathing, and functions. Learn how the body brings oxygen in and removes carbon dioxide.
