Lymph capillaries end blindly in the body tissues, where pressure from the accumulation of _ forces the fluid into the lymph capillaries:
Correct answer: D. Interstitial or extracellular fluid
- A. Interstitial fluid
- B. Extracellular fluid
- C. Intracellular fluid
- D. Interstitial or extracellular fluid
Explanation
Lymph capillaries or lymphatic capillaries are tiny, thin walled vessels located in the spaces between cells (except in the central nervous system and non-vascular tissues) which serve to drain and process extracellular fluid. Upon entering the lumen of a lymphatic capillary, the collected fluid along with associated cells (notably white blood cells) is known as lymph. Lymphatic capillaries are slightly larger in diameter then blood capillaries and have closed ends. Their unique structure permits, interstitial fluid to flow into them but not out.
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The circulatory system covers the chambers, valves and conducting pathway of the human heart, along with the cardiac cycle and control of heartbeat. It compares arteries, veins and capillaries by structure and function, and explains how the lymphatic system returns tissue fluid, transports absorbed fats and supports immunity.
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