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  1. Excretion - Wikipedia

    Excretion is elimination of metabolic waste, which is an essential process in all organisms. In vertebrates, this is primarily carried out by the lungs, kidneys, and skin. [1]

  2. Excretion | Definition, Systems, Examples, Importance, & Facts

    Dec 3, 2025 · Excretion is a general term referring to the separation and throwing off of waste materials or toxic substances from the cells and tissues of a plant or animal.

  3. Excretion Definition - General Biology I Key Term | Fiveable

    Excretion is the biological process through which animals eliminate waste products generated from metabolic activities. This process is essential for maintaining homeostasis, as it helps to regulate the …

  4. Excretion - Definition, Function, Types, Examples, Metabolites

    Nov 28, 2025 · Excretion is the biological process by which organisms eliminate metabolic wastes such as urea, ammonia, CO₂, excess water, and salts. Humans excrete waste through kidneys, lungs, …

  5. What Is Excretion? The Purpose and Process in the Body

    Excretion is a biological process that removes waste products from living organisms. These wastes are byproducts of metabolic activities within cells. Removing these substances is essential for …

  6. What Is Excretion? The Body’s Waste Removal System

    Nov 20, 2025 · Excretion is the process by which an organism removes the waste products generated by its metabolism. These wastes are chemical by-products of cellular activity, such as the breakdown …

  7. EXCRETION Definition & Meaning - Merriam-Webster

    Dec 7, 2016 · The meaning of EXCRETION is the act or process of excreting. How to use excretion in a sentence.

  8. Excretion - Definition and Examples | Biology Dictionary

    Apr 17, 2019 · Excretion is the process that biological organisms use to expel or eliminate the waste products produced by their metabolisms.

  9. Excretory System - CK-12 Foundation

    Jan 1, 2026 · Excretion is the process of removing wastes and excess water from the body. It is one of the major ways the body maintains homeostasis. Although the kidneys are the main organs of …

  10. EXCRETION | definition in the Cambridge English Dictionary

    Excretion is one of several activities common to both plants and animals. Eating too much salt causes the excretion of excessive amounts of calcium.