describe the structure of human respiratory with the help of diagram
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The Respiratory System - Structure And Function
The respiratory system is the system in the human body that enables us to breathe.
The act of breathing includes: inhaling and exhaling air in the body; the absorption of oxygen from the air in order to produce energy; the discharge of carbon dioxide, which is the byproduct of the process.
The parts of the respiratory system
The respiratory system is divided into two parts:
Upper respiratory tract:
This includes the nose, mouth, and the beginning of the trachea (the section that takes air in and lets it out).
Lower respiratory tract:
This includes the trachea, the bronchi, broncheoli and the lungs (the act of breathing takes place in this part of the system).
The organs of the lower respiratory tract are located in the chest cavity. They are delineated and protected by the ribcage, the chest bone (sternum), and the muscles between the ribs and the diaphragm (that constitute a muscular partition between the chest and the abdominal cavity).
The trachea – the tube connecting the throat to the bronchi.
The bronchi – the trachea divides into two bronchi (tubes). One leads to the left lung, the other to the right lung. Inside the lungs each of the bronchi divides into smaller bronchi.
The broncheoli - the bronchi branches off into smaller tubes called broncheoli which end in the pulmonary alveolus.
Pulmonary alveoli – tiny sacs (air sacs) delineated by a single-layer membrane with blood capillaries at the other end.
The exchange of gases takes place through the membrane of the pulmonary alveolus, which always contains air: oxygen (O2) is absorbed from the air into the blood capillaries and the action of the heart circulates it through all the tissues in the body. At the same time, carbon dioxide (CO2) is transmitted from the blood capillaries into the alveoli and then expelled through the bronchi and the upper respiratory tract.
The inner surface of the lungs where the exchange of gases takes place is very large, due to the structure of the air sacs of the alveoli.
The lungs – a pair of organs found in all vertebrates.
The structure of the lungs includes the bronchial tree – air tubes branching off from the bronchi into smaller and smaller air tubes, each one ending in a pulmonary alveolus.
The respiratory system is the system in the human body that enables us to breathe.
The act of breathing includes: inhaling and exhaling air in the body; the absorption of oxygen from the air in order to produce energy; the discharge of carbon dioxide, which is the byproduct of the process.
The parts of the respiratory system
The respiratory system is divided into two parts:
Upper respiratory tract:
This includes the nose, mouth, and the beginning of the trachea (the section that takes air in and lets it out).
Lower respiratory tract:
This includes the trachea, the bronchi, broncheoli and the lungs (the act of breathing takes place in this part of the system).
The organs of the lower respiratory tract are located in the chest cavity. They are delineated and protected by the ribcage, the chest bone (sternum), and the muscles between the ribs and the diaphragm (that constitute a muscular partition between the chest and the abdominal cavity).
The trachea – the tube connecting the throat to the bronchi.
The bronchi – the trachea divides into two bronchi (tubes). One leads to the left lung, the other to the right lung. Inside the lungs each of the bronchi divides into smaller bronchi.
The broncheoli - the bronchi branches off into smaller tubes called broncheoli which end in the pulmonary alveolus.
Pulmonary alveoli – tiny sacs (air sacs) delineated by a single-layer membrane with blood capillaries at the other end.
The exchange of gases takes place through the membrane of the pulmonary alveolus, which always contains air: oxygen (O2) is absorbed from the air into the blood capillaries and the action of the heart circulates it through all the tissues in the body. At the same time, carbon dioxide (CO2) is transmitted from the blood capillaries into the alveoli and then expelled through the bronchi and the upper respiratory tract.
The inner surface of the lungs where the exchange of gases takes place is very large, due to the structure of the air sacs of the alveoli.
The lungs – a pair of organs found in all vertebrates.
The structure of the lungs includes the bronchial tree – air tubes branching off from the bronchi into smaller and smaller air tubes, each one ending in a pulmonary alveolus.
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