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Circulatory System JHS 3 (Basic 9)

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  THE HUMAN CIRCULATORY SYSTEM JHS 3 (SYSTEMS) INTRODUCTION The human circulatory system , also known as the cardiovascular system , consists of a network of arteries, veins, and capillaries, with the heart pumping blood through it. Its primary role is to provide essential nutrients, minerals, and hormones to various parts of the body. Alternatively, the circulatory system is also responsible for collecting metabolic waste and toxins from the cells and tissues to be purified or expelled from the body. Crucial features of the human circulatory system ·          Blood – A fluid that carries essential substances. ·          Blood Vessels – Tubes through which blood flows (arteries, veins, and capillaries). ·          The Heart – A muscular organ that pumps blood. Features of Circulatory System ·        ...
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ACIDS, BASES AND SALTS.

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  ACIDS, BASES AND SALTS. Acids Acids are substances that, when dissolved in water, donate protons or hydrogen ions (H⁺). This donation or acceptance of protons characterizes their acidic properties. Acids generally have a sour taste, turn blue litmus paper red, and have a pH less than 7. Examples Hydrochloric acid (HCl) Sulfuric acid (H₂SO₄) Nitric acid (HNO₃) Acetic acid (CH₃COOH) Citric acid (found in citrus fruits like lemons and oranges) Lactic acid (found in sour milk and yogurt) Tartaric acid (found in grapes and tamarinds) Malic acid (found in apples and sour cherries) Types Based on Source Inorganic Acids Inorganic acids are derived from inorganic compounds that are mixed in the laboratories in some specific ways and proportions. Examples Hydrochloric acid (HCl), Sulfuric acid (H₂SO₄) and Nitric acid (HNO₃).   Organic Acids Organic acids are derived from organic compounds obtained from plants and an...
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