Heаrt Diаgrаm Type in the number оnly, frоm the diagram that cоrresponds to the descriptions below. Example: 2 (not 2. or "2") (Some structures might not be used.) a. This chamber is the first to receive oxygenated blood from the lungs. [blank9] b. When deoxygenated blood returns from the head, it enters the heart via this/these large blood vessel(s). [blank10] c. Blood vessel(s) that deliver(s) deoxygenated blood to the lungs. [blank8] d. This muscular structure separates oxygenated from deoxygenated blood. [blank1] e. This valve keeps blood from flowing back into the right atrium. [blank4] f. The wall of this chamber houses the SA node or pacemaker. [blank5] g. This is the most muscular chamber of the heart and pumps blood to the entire body. [blank6] h. Blood vessel(s) that return(s) oxygenated blood from the lungs back to the heart. [blank7] i. This large artery brings oxygenated blood to the body. [blank2] j. This muscular chamber pumps blood through the pulmonary arteries on the way to the lungs. [blank3]