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The human urinary system, also known as the excretory system, is responsible for filtering waste from the blood, regulating fluid and electrolyte balance, and removing these waste products from the body through urine. The major components of this system include: Kidneys: These are two bean-shaped organs located in the lower back, just below the rib … Read more
Gaseous exchange in fish and humans is fundamentally similar in that both processes involve the exchange of oxygen and carbon dioxide between the respiratory medium (water for fish, air for humans) and the bloodstream. However, the mechanisms by which this exchange takes place differ significantly due to the differences in the environment and the respiratory … Read more
The alveoli are tiny, balloon-like structures found at the ends of the bronchial tubes in the lungs. They are a critical part of the human respiratory system and are involved in the exchange of gases—specifically oxygen and carbon dioxide—between the air and the bloodstream. Here’s a breakdown of their structure and function: Structure of Alveoli: … Read more
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
Tobacco smoke is harmful for several reasons, primarily due to the toxic chemicals it contains. Here’s why tobacco smoke is dangerous: 1. Chemical Composition: Tobacco smoke contains over 7,000 chemicals, many of which are toxic and carcinogenic (cancer-causing). Some of the harmful chemicals include: Nicotine: An addictive substance that causes dependency and raises heart rate … Read more
1. Bronchitis Signs and Symptoms: Persistent cough (often with mucus) Shortness of breath Wheezing Fatigue Chest discomfort or tightness Low-grade fever (in some cases) Causes: Acute bronchitis: Often caused by viral infections (e.g., cold or flu viruses) but can also result from bacterial infections or exposure to irritants like smoke, dust, or pollution. Chronic bronchitis: … Read more