What system circulates blood and lymph throughout the body?

The circulatory system is responsible for transporting blood and lymph throughout the body. It consists of the heart, blood vessels, and blood, as well as the lymphatic system, which includes the lymph nodes and lymph vessels. The primary function of this system is to deliver oxygen and nutrients to the tissues and to remove waste products such as carbon dioxide. The lymphatic component plays a crucial role in immune function by transporting lymph, which contains white blood cells, and helps in the removal of excess fluids and waste from the tissues.

The other systems listed do not have this primary role. The respiratory system focuses on the exchange of gases, primarily oxygen and carbon dioxide, in the lungs. The digestive system is involved in breaking down food and absorbing nutrients. The endocrine system regulates bodily functions through hormones, influencing growth, metabolism, and mood but does not circulate blood or lymph. Therefore, the circulatory system is the only option that encompasses the functions of circulating both blood and lymph throughout the body.