The _____ are paired organs found inside the pleural cavities. 

________ ________ is gas exchanged between blood in capillaries and the interstitial fluid. 

The ______. _______ is where gas exchange occurs and contains the lungs and all of their components. 

_____ ______ are small organs that filter lymph and are fully of white blood cells which destroy bacteria and foreign particles. 

How many lymphatic ducts are located in the body that drain lymph into veins near the heart?

The top chambers of the heart that receive blood coming into the heart are called _____.

Major artery of the body is the _______.

_____ are a type of blood vessel that carries blood to your heart.

The white blood cells (WBC’s) that are immune response cells that fight infection are _______.

The smallest blood vessels that are found in almost all tissues of the body are ________.