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The pleural membrane surrounds the lungs and secretes fluid to reduce friction between the lungs and the chest wall during breathing. Related Questions: Name the structure through which the exchange of gases can take place in plants. Name the ways through which a plant can obtain oxygen. Why should one not sleep under a tree … Read more
At high altitudes, the air pressure is lower, reducing the amount of oxygen available. This makes it harder for oxygen to diffuse into the blood, causing breathlessness. Related Questions: Name the structure through which the exchange of gases can take place in plants. Why should one not sleep under a tree at night? Why would … Read more
Carbon monoxide binds with hemoglobin more strongly than oxygen, reducing the blood’s ability to carry oxygen to cells, leading to oxygen deficiency. Related Questions: Name the structure through which the exchange of gases can take place in plants. Name the ways through which a plant can obtain oxygen. Why should one not sleep under a … Read more
Cilia in the trachea and bronchi help trap dust, bacteria, and other harmful particles, moving them toward the throat for removal. This protects the lungs from infections. Related Questions: Name the structure through which the exchange of gases can take place in plants. Name the ways through which a plant can obtain oxygen. Why should … Read more
During exercise, muscles require more oxygen for respiration and produce more carbon dioxide. To meet this demand, the breathing rate increases to supply more oxygen and remove excess carbon dioxide. Related Questions: Name the structure through which the exchange of gases can take place in plants. Name the ways through which a plant can obtain … Read more
(a) Identify structure Z. Answer: Structure Z is the alveolus. (b) Name the gases X and Y. X: Oxygen (O₂) Y: Carbon dioxide (CO₂) (c) What is the name of the blood leaving at point E? The blood leaving at point E is oxygenated blood. Related Questions: Name the structure through which the exchange of … Read more
(a) Identify the disease and the affected part of the lung. The disease is emphysema, and the affected part is the alveoli. (b) How does part B show structural variation from part A? In part B (diseased lung), the alveoli are damaged and enlarged, reducing their surface area for gas exchange. The walls of the … Read more
(a) Identify I, II, X, Y, and Z. I: Inspired air II: Expired air X: Oxygen (O₂) Y: Carbon dioxide (CO₂) Z: Nitrogen (N₂) (b) Why is gas X almost negligible in Figure I? Answer: Gas X (carbon dioxide) is negligible in inspired air because atmospheric CO₂ is present in very low amounts (0.04%). (c) … Read more
Cigarette smoking damages the cilia lining the trachea, reducing their ability to clear mucus and dust. This leads to mucus buildup, irritation, and chronic cough. Smoking also increases the risk of lung infections, bronchitis, and lung cancer. Related Questions: Name the structure through which the exchange of gases can take place in plants. Name the … Read more
Efficient gaseous exchange between an organism and its environment requires several conditions that ensure oxygen can enter the organism and carbon dioxide can be expelled. These conditions include: Large Surface Area: A large surface area allows for more contact between the gases and the exchange surfaces, which increases the efficiency of the process. For example, … Read more