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 A protective sac that encloses the heart. A protein found in red blood cells that transport, or carries oxygen. Hemoglobin Component A part of a larger object or system Pericardium The liquid part of blood; 90% of plasma is water. To carry something one place to another. Related to the circulation of blood. Circulatory Plasma The smallest, functioning unit of a living organism. Transport Cell