Which organ system includes the heart and blood vessels?

The organ system that includes the heart and blood vessels is the cardiovascular system. This system is primarily responsible for the circulation of blood throughout the body, delivering oxygen and nutrients to tissues while removing carbon dioxide and waste products. The heart acts as a pump, propelling blood through a network of arteries and veins.

In contrast, the respiratory system is involved in the exchange of gases, allowing oxygen to enter the body and carbon dioxide to be expelled. The digestive system focuses on the breakdown of food for nutrient absorption, and the endocrine system regulates bodily functions through hormones. Thus, the cardiovascular system is distinct in its sole focus on the movement and management of blood circulation.