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Starling law of the capillaries explains the balance between fluid lost from the capillaries and fluid reabsorbed by the capillaries.

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Final answer:

The Starling law of the capillaries is a mechanism that balances fluid filtration and reabsorption in capillaries; about 24 liters of fluid are filtered per day with approximately 20.4 liters reabsorbed, and excess fluid is collected by the lymphatic system.

Step-by-step explanation:

The statement that Starling law of the capillaries balances the fluid lost from and reabsorbed by the capillaries is true. Capillary exchange involves both filtration and reabsorption. Filtration occurs at the arterial end of the capillaries where capillary hydrostatic pressure (CHP) is greater than blood colloidal osmotic pressure (BCOP), pushing fluid out into the interstitial space. This pressure gradient reverses at the venous end of the capillaries where BCOP exceeds CHP, resulting in the net reabsorption of fluid back into the circulatory system.

Typically, about 24 liters of fluid are filtered by capillaries per day, and approximately 20.4 liters are reabsorbed. The remaining fluid, which is not reabsorbed directly, is collected by the lymphatic system, transported through lymphatic vessels, and eventually returned to the vascular system.

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