The document outlines the pathway of blood circulation through the heart and major blood vessels. It takes about 1 minute for blood to complete one full cycle through the circulatory system. The document also describes key structures of the heart, including the papillary muscles, chordae tendineae, and valves, and their functions in preventing backflow of blood through the heart.

2. Pathway of Circulation161414151713668912510231141It takes about 1 min. for blood to make 1 complete cycleAnd so on…

3. Structures of the HeartPapillary muscleChordae tendinease“Heart strings”Cord-like tendonsConnect papillary muscles to tricuspid and mitral valvesPrevent inversionof valvePapillary musclesSmall muscles that anchor the cords

4. Structures of the Heartleft common carotid arterybrachiocephalic arteryright pulmonary arteryleft subclavian arteryright pulmonary veinsaortaleft pulmonary arterypulmonary trunksuperior vena cavaleft pulmonary veinsleft atrium (auricle)aortic valvemitral valveright atriumpulmonary valvetricuspid valvepapillary muscleleft ventricleright ventricleseptuminferior vena cava© 2006 Merriam-Webster, Inc.1411321715463512161179810