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The primary component of intra- and extracellular fluid is _____.

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Final answer:

The primary component of intra- and extracellular fluid is water. It is vital for physiological processes and homeostasis, making up about 60% of the body's water.

Step-by-step explanation:

The primary component of intra- and extracellular fluid is water. In humans, water accounts for about 60 percent of the total body water and is the principal component of the cytosol/cytoplasm, known as the intracellular fluid (ICF). The ICF contained within cells is essential for normal cellular activities and makes up a considerable amount, about 25 liters in an average adult male.

Conversely, the extracellular fluid (ECF) - including interstitial fluid, plasma, and lymph - is also predominantly made of water, surrounds the body's cells, delivers nutrients, and removes waste products. Maintaining a stable balance of water within these fluid compartments is critical for physiological processes and homeostasis.

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