Memory Game Circulatory Story VocabularyOnline version In this game, you will have to match the word to its definition. These word are from the our story, The Circulatory Story. by Whitney Gurrola Circulatory Component Cell The smallest, functioning unit of a living organism. A protective sac that encloses the heart. Related to the circulation of blood. A protein found in red blood cells that transport, or carries oxygen. Pericardium Hemoglobin The liquid part of blood; 90% of plasma is water. Transport A part of a larger object or system To carry something one place to another. Plasma