What is one of the diseases associated with the circulatory system?

Congestive heart failure (CHF) is a condition that directly affects the circulatory system. It occurs when the heart is unable to pump blood efficiently, leading to a buildup of fluid in the lungs and other body tissues. This can manifest as symptoms such as shortness of breath, fatigue, and swelling in the legs and ankles. Understanding CHF as part of the circulatory system is crucial since it impacts how blood is circulated throughout the body, influences oxygen delivery to tissues, and affects overall bodily function.

The other options pertain to neurological and autoimmune conditions. Epilepsy is a disorder characterized by recurrent seizures and is related to brain function. Multiple sclerosis affects the nervous system, specifically the communication between the brain and body due to the degradation of the myelin sheath. Parkinson's disease is also a neurological disorder that affects movement and coordination. These disorders, while significant, do not fall under the category of diseases associated with the circulatory system.