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Respiratory system of Humans - BYJUS The alveoli are single-celled sacs of air with thin walls It facilitates the exchange of oxygen and carbon dioxide molecules into or away from the bloodstream
Type 1 Pneumocytes - BYJUS The type 1 cells are involved in gaseous exchange between the alveoli and capillaries The thinness of these cells allows fast diffusion of gases The type 1 cells cannot replicate at the time of toxicity, so the type 2 cells differentiate to form type 1 cells, and compensate for the damage Type 2 Pneumocytes
Respiratory system in Humans - BYJUS Alveoli Each bronchiole ends in spongy, tiny sacs – alveoli; each of the individual sacs is referred to as alveolus Each alveolus fills with air when a person inhales Together, the bronchi, bronchioles and alveoli constitute the bronchial tree The alveoli are surrounded by tiny blood vessels referred to as capillaries
Terminal Bronchioles - BYJUS Respiratory Bronchioles The respiratory zone consists of the respiratory bronchioles, alveoli and alveolar ducts It is the main site for the exchange of O 2 and CO 2 with the blood The alveolar ducts and the respiratory bronchioles are together responsible for around 10% of gas exchange The remaining 90% is taken care of by the alveoli
What is Respiration? - BYJUS Respiration is the process through which living organisms take in oxygen and give out carbon dioxide to release energy So, naturally, respiration is a major and vital process of gas exchange The transport of gases during respiration, both oxygen and carbon dioxide are carried out by the blood cells
BYJUS 1 In which part of the respiratory system, gaseous exchange takes place? (a) Alveoli (b) Pharynx (c) Larynx (d) Trachea Sol (a) Alveoli 2 ___________ is located between two pleural sacs and is the central compartment of the thoracic cavity? (a) Hilum (b) Pleura (c) Mediastinum (d) Thoracic cage Sol (c) Mediastinum 3 Which of the following statements is true about involuntary breathing
Lungs have a large number of alveoli for - BYJUS Alveoli serve primarily to increase the surface area available for gas exchange Each of the lungs contains roughly 300 million alveoli These tiny air sacs offer the best location for gas diffusion into and out of the blood (gas exchange) The surface area of the alveoli is enormous Explanation of the incorrect options: Option A: