Respiration and Elimination of Nitrogenous Wastes

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Respiration is the step-wise oxidation of glucose that releases energy stored in the form of ATP (adenosine triphosphate). It involves gaseous exchange and cellular processes to provide energy for bod…

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Breathing is the mechanical process of inhaling and exhaling air. Inspiration is the active phase where air enters the lungs due to diaphragm contraction. Expiration is the passive phase where air lea…

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Cockroaches respire through a tracheal system. Air enters through spiracles on the body surface, travels through tracheae and tracheoles, and diffuses directly into cells. The fluid-filled ends of tra…

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Spiracles are paired slit-like openings on the thorax and abdomen of cockroaches that connect the external environment to the internal tracheal system, allowing air to enter and exit.

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The human respiratory system includes nostrils, nasal cavities, pharynx, larynx, trachea, bronchi, bronchioles, and alveoli. The alveoli are tiny sacs surrounded by capillaries where gaseous exchange …

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Alveoli are the site of gaseous exchange in the lungs. Their thin, moist walls richly supplied with blood capillaries allow oxygen to diffuse into the blood and carbon dioxide to diffuse out from the …

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During inspiration, the diaphragm contracts and flattens while external intercostal muscles lift the rib cage. This increases the volume of the thoracic cavity, decreasing pressure inside the lungs. A…

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Inspiration requires muscular contraction (diaphragm and intercostals), making it active. Expiration usually occurs due to relaxation of these muscles and elastic recoil of lungs, making it passive un…