2. Put the following structures in the proper order (#1-21) in which blood flows through the cardiovascular system. 1_ Right atrium Left ventricle 21_ Vena cava Pulmonary trunk Tricuspid valve Systemic capillaries Pulmonary capillaries Pulmonary arteries _19_ Systemic venules Right ventricle Aortic valve Aorta Pulmonary veins Mitral valve Systemic veins _17_ Systemic arterioles 9_ Pulmonary venules Pulmonary valve Left atrium Systemic arteries _7_ Pulmonary arterioles

8. We discussed fish, amphibian, and mammalian hearts, but didn’t spend much time on reptiles and birds. Please compare and contrast the anatomy of the heart ina) most reptiles (turtles, snakes, lizards) in terms of number of atria, number of ventricles, total number of chambers, and development of the aorta from aortic arches (left, right, or both). Use a table, not text. Also, include a drawing showing the basic template of dorsal aorta, ventral aorta, and six aortic arches, along with drawings showing the modified patterns of aortic arches in a-d above.

1. You should be able to distinguish two heart sounds.  The first sound is when the ventricle begins contracting (ventricular systole) the atrioventricular valves snap shut.  This closing produces a low-pitched sound, the "lub" sound. The atrioventricular valves close when the ventricles contract due to pressure coming from the blood in the: Group of answer choices veins ventricles arteries atria   2.  The "lub" sound is accompanied by the pulmonary and aortic (semilunar) valves opening. This, too, happens when the ventricles contract. These valves open due to pressure of the blood coming from the: Group of answer choices atria ventricles arteries veins   3. The second sound you hear in the heartbeat is when the ventricles begin to relax (diastole). The closing of the pulmonary and aortic (semilunar) valves produces a sound, the "dub" sound. These valves close when the ventricles relax due to the pressure of the blood coming from the: Group of answer choices atria…

HQ6. Put the labels to the location of the structure being described.

18. Under the microscope, I can see a section through one of the chambers of the heart. The myocardium is thick and the endocardium is very thin. In addition, I can see a valve that connects this chamber to the next which has two cusps that prevent backflow from one chamber into another. Where in the heart am 1? What does the thickness of the myocardium tell you about this region of the heart? What is the valve called? What does it do? What other valve would you see in this area of the heart? Where is it situated?

#7

10. Segment representing the time heart muscle is electrically silent 18. Waveform representing total ventricular SYSTOLE 19. Repolarization of the atria is found within which wave 20. Firing of the AV node occurs at the apex of which wave 19. Repolarization of the atria is found within which wave 20. Firing of the AV node occurs at the apex of which wave

#11

5. Describe the conductions of electrical signals through the heart. answer this question with a narrative of the structures involved in initiating and coordinating the contraction of the heart. You need to include the function of each structure. Mention  pacemaker cells, the sinoatrial node, atrioventricular node, internodal pathway, bundle of His, bundle branches, Purkinje fibers, first degree block, second degree block, and third degree block.

Complete the pathway of blood... RIGHT ATRIUM FOOT | PULMONARY VALVE RIGHT VENTRICLE INFERIOR VENA CAVA SUPERIOR VENA CAVA MITRAL Leave PULMONARY VALVE VEINS one TRICUSPID AORTIC LEFT LEFT here i PULMONARY LUNGS VALVE VALVE VENTRICLE ATRIUM ARTERIES DRAGO,