The first consequence of lymphatic blockage in tissues is:
- A. Deficiency of oxygen
- B. Loss of nerve signals
- C. Drop in blood pressure
- D. Excess fluid accumulation in tissue
Explanation
The lymphatic system is the only route by which surplus tissue fluid returns to the blood, so blocking it lets fluid collect between the cells and the limb swells, which is the oedema of filariasis. Blood flow through the arteries and capillaries continues normally, so oxygen delivery and blood pressure are not affected first. The swelling is soft and painless in the early stages for exactly this reason.