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一、体液的分布和组成水是人体的主要成分。水在人体内并不是以纯水的形式存在,而是一种溶解多种无机盐(K~+、Na~+、Ca~(2+)、Mg~(2+)、Cl~-、HCO_3~-等)和有机物(糖、蛋白质)的水溶液。这种水溶液称为体液。因此,体液的主要物质结构是水和电解质,另外还有一些非电解质。电解质主要是盐类,指溶解于水后能解离或带有电荷颗粒的物质,有阴、阳离子。非电解质主要是葡萄糖和尿素等物质。
First, the distribution and composition of body fluids Water is the main component of the body. Water is not in the form of pure water in the human body, but rather a solution of various inorganic salts (K ~ +, Na ~ +, Ca ~ (2 +), Mg ~ (2 +), Cl ~ -, HCO_3 ~ -, etc.) and organic matter (sugar, protein) in water. This aqueous solution is called body fluid. Therefore, the main material structure of body fluids is water and electrolyte, in addition to some non-electrolyte. Electrolytes are mainly salts, which means substances that can be dissociated or charged with water after they have been dissolved in water. They are anionic and cationic. Non-electrolytes are mainly glucose and urea and other substances.