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