Blood vessels that carry blood away from the heart *but* they carry *DEOXYGENATED* blood. #6 in picture

First part of Cardiac Conduction System: This *PACEMAKER* sends action potentials to both atria causing them to contract.

Second part of Cardiac Conduction System: This structure receives a signal and passes it on to the Bundle of His

Third part of Cardiac Conduction System: This structures branches down from septum and out towards each ventricle. They *relay* the signal to the Purkinje fibers.

They send action potentials to the cells in the ventricles, causing them to contract.

Largest artery in the body that carries blood from left ventricle to the rest of the body. #5 in picture

Receiving chambers of the heart; found in upper half of heart. #3 & #7 in picture

Lower chambers of the heart that are larger and more muscular in order to pump blood out of the heart. #2 & #9 in picture

One of two large vessels (superior and inferior) that return deoxygenated blood to the right atrium of the heart. #1 & #4 in picture.

This side of the heart pumps oxygenated blood:

Deoxygenated blood travels from the right atrium to the right ventricle through this valve:

This valve allows the passage of blood from the right ventricle to the pulmonary artery:

This structure prevents the backwards movement of blood:

Which valves separate ventricles and arteries?

The largest artery in the body is the:

Blood from the Inferior and Superior Vena Cava empties into the: #3 in picture.

Which term refers to the lungs?

Which structure separates the right and the left ventricles? (unlabeled in picture)