Colorado CNA Practice Exam 2025 - Free CNA Practice Questions and Study Guide

Fluid overload occurs when the body's ability to handle excess fluid is compromised, often due to improper functioning of vital organs involved in fluid regulation. The kidneys play a crucial role in filtering blood, removing excess fluids and waste from the body through urine. If the kidneys are not working properly, they cannot effectively eliminate surplus fluids, leading to fluid overload.

Additionally, the lungs are involved in regulating the fluid balance through breathing. They help manage moisture in the body, and when lung function is impaired, it can contribute to issues such as fluid accumulating in the lungs, which can manifest as pulmonary edema.

This is why the combination of kidney and lung dysfunction directly relates to the risk of fluid overload. The other options include organs that have different primary functions and do not relate as directly to fluid regulation in the same manner as the kidneys and lungs.