ICSE Class 10 Answered
- The lymphatic system acts as a drainage system because, as blood circulates through the body, blood plasma leaks into tissues through the thin walls of the capillaries.
- The portion of blood plasma that escapes is called interstitial or extracellular fluid, and it contains oxygen, glucose, amino acids, and other nutrients needed by tissue cells.
- Although most of this fluid seeps immediately back into the bloodstream, a percentage of it, along with the particulate matter, is left behind.
- The lymphatic system removes this fluid and these materials from tissues, returning them via the lymphatic vessels to the bloodstream, and thus prevents a fluid imbalance that would result in the organism’s death.
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