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What is blood made up of? Blood is made up of about 55% blood plasma and about 45% various kinds of blood cells. Blood plasma is a gentle yellow, slightly cloudy liquid. Over 90% of blood plasma is water, while lower than 10% consists of dissolved substances, largely proteins. Blood plasma additionally contains electrolytes, vitamins and nutrients resembling glucose and amino acids. Over 99% of the stable particles in blood are cells referred to as crimson blood cells (erythrocytes) as a consequence of their pink colour. The remaining are pale or colorless white blood cells (leukocytes) and platelets (thrombocytes). Red blood cells appear like discs which are thinner in the middle. They will simply change form to "squeeze through" slender blood vessels. Unlike many different cells, pink blood cells have no nucleus ("information middle"). All pink blood cells contain a red pigment known as hemoglobin. Oxygen binds to hemoglobin, and is transported around the body in that method.
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发表于 2025-10-21 08:39:06