What organs are included in the circulatory system?

The circulatory system is primarily composed of the heart and blood vessels, which play a crucial role in transporting blood throughout the body. The heart serves as the central pump, ensuring that oxygen-rich blood is circulated to various tissues and organs, while blood vessels, including arteries and veins, form a network that facilitates this movement. This system is essential for delivering nutrients and oxygen to cells, as well as removing waste products such as carbon dioxide.

In contrast, the other options represent organs that serve different functions within the body. The liver and gallbladder are part of the digestive system, involved in the processing and storage of nutrients. The esophagus and intestines are also components of the digestive system, responsible for the transport and breakdown of food. The kidneys and ureters are part of the urinary system, which is responsible for filtering blood and removing waste products in the form of urine. Each of these organ groups contributes to specific body systems that function independently from the circulatory system.