Which system focuses on signs and symptoms such as chest pain and palpitations?

The cardiovascular system is specifically concerned with the heart and the blood vessels, and it plays a crucial role in transporting blood throughout the body. In the context of the question, signs and symptoms like chest pain and palpitations are directly associated with cardiovascular issues. Chest pain can indicate various heart conditions such as angina or myocardial infarction, while palpitations may reflect arrhythmias or other heart-related conditions. Thus, the focus on these symptoms signifies an emphasis on cardiovascular health and the functioning of the heart and circulatory system.

In contrast, the gastrointestinal system would relate to digestive issues, the musculoskeletal system pertains to muscles, bones, and joints, and the neurological system deals with the brain and nerves. Therefore, while all options address different medical areas, only the cardiovascular system is appropriately linked with the symptoms mentioned in the question.