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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 purpose of the pharynx in the respiratory system?
What is the purpose of the pharynx in the respiratory system?
What is the role of the bronchioles in the respiratory system?
What is the role of the bronchioles in the respiratory system?
What happens to the diaphragm during inhalation?
What happens to the diaphragm during inhalation?
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What is the function of the rib cage in the respiratory system?
What is the function of the rib cage in the respiratory system?
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What is the process by which oxygen from the air we breathe enters the blood?
What is the process by which oxygen from the air we breathe enters the blood?
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What is the purpose of exhalation?
What is the purpose of exhalation?
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What is the role of the alveoli in the respiratory system?
What is the role of the alveoli in the respiratory system?
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Study Notes
Overview
- The respiratory system is a biological system that brings oxygen into the body and removes carbon dioxide
- It is essential for the survival of all living organisms
Components
- 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, which divides into two bronchi
- Bronchi: air passes through the bronchi, which branch into smaller and smaller tubes like the branches of a tree
- Bronchioles: air passes through the bronchioles, which lead to the alveoli
- Alveoli: air reaches the alveoli, where oxygen is absorbed into the blood and carbon dioxide is removed
- Diaphragm: a dome-shaped muscle that separates the chest cavity from the abdominal cavity
- Rib cage: the rib cage protects the lungs and helps with breathing
Process of Breathing
-
Inhalation:
- Diaphragm contracts and flattens, increasing the volume of the chest cavity
- Rib cage expands, increasing the volume of the chest cavity
- Air enters the lungs through the nose or mouth
-
Exhalation:
- Diaphragm relaxes and rises, decreasing the volume of the chest cavity
- Rib cage descends, decreasing the volume of the chest cavity
- Air leaves the lungs through the nose or mouth
Gas Exchange
- Oxygen from the air we breathe diffuses into the blood through the alveoli
- Carbon dioxide from the blood diffuses into the alveoli and is exhaled out of the body
- Oxygen-rich blood is transported to the body's tissues through the circulatory system
- Carbon dioxide-rich blood is transported back to the lungs through the circulatory system
Respiratory System
- Brings oxygen into the body and removes carbon dioxide
- Essential for the survival of all living organisms
Components of the Respiratory System
- Nose and mouth: air entrance points
- Pharynx (throat): connects nose and mouth to lungs
- Larynx (voice box): contains vocal cords
- Trachea (windpipe): divides into two bronchi
- Bronchi: branch into smaller and smaller tubes
- Bronchioles: lead to alveoli
- Alveoli: oxygen absorption and carbon dioxide removal
- Diaphragm: dome-shaped muscle separating chest and abdominal cavities
- Rib cage: protects lungs and aids in breathing
Breathing Process
Inhalation
- Diaphragm contracts and flattens, increasing chest cavity volume
- Rib cage expands, increasing chest cavity volume
- Air enters lungs through nose or mouth
Exhalation
- Diaphragm relaxes and rises, decreasing chest cavity volume
- Rib cage descends, decreasing chest cavity volume
- Air leaves lungs through nose or mouth
Gas Exchange
- Oxygen diffuses into blood through alveoli
- Carbon dioxide diffuses from blood into alveoli and is exhaled
- Oxygen-rich blood is transported to body tissues through circulatory system
- Carbon dioxide-rich blood is transported back to lungs through circulatory system
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Description
Learn about the biological system that brings oxygen into the body and removes carbon dioxide. Discover the components of the respiratory system.
