Chapter 15 Excretion and Osmoregulation
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Excretion is the biological process by which organisms eliminate waste products of metabolism, such as carbon dioxide, water, salts, and nitrogenous wastes (like ammonia, urea, and uric acid). This process helps maintain internal balance and remove harmful substances from the body.
Osmoregulation, on the other hand, is the process by which organisms control the concentration of water and solutes within their bodies to maintain internal balance or homeostasis. This is crucial because cells require a specific environment to function properly, and fluctuations in water and solute concentrations can disrupt cellular processes. Osmoregulation mechanisms vary across different organisms and can involve processes such as filtration, reabsorption, and secretion to regulate water and solute levels.