a. aorta b. atrioventricular sulcus c. atrium d. bicuspid (mitral) valve e. cardiac vein f. coronary artery g. coronary sinus h. endocardium i. interventricular sulcus j. myocardium k. papillary muscle l. pericardial cavity m. pericardial sac n. pulmonary trunk o. tricuspid valve the descriptions in column B. Place the letter of your choice in the space provided.
Column B _ 1. upper chamber of the heart
_ 2. structure from which chordae tendineae originate
_ 4. double-layered membrane around heart
_ 5. groove separating left and right ventricles
__6. prevents blood movement from left ventricle to left atrium
__7. gives rise to left and right pulmonary arteries
__8. drains blood from myocardium into right atrium
__9. inner lining of heart chamber
__10. layer largely composed of cardiac muscle tissue
__11. space containing serous fluid to reduce friction during heartbeats
__12. drains blood from myocardial capillaries
__13. supplies blood to heart muscle
__14. distributes blood to body organs (systemic circuit) except lungs
__15. groove separating atrial and ventricular portions of heart
Complete the following: 1. Compare the structure of the tricuspid valve with that of the pulmonary valve.
2. Describe the action of the tricuspid valve when you squeezed the water-filled right ventricle.
3. Describe the function of the chordae tendineae and the papillary muscles.
4. What is the significance of the difference in thickness between the wall of the aorta and the wall of the pulmonary trunk? _
5. List in order the major blood vessels, chambers, and valves through which a drop of blood must pass in traveling from a vena cava to the aorta. _
Critical Thinking Application
What is the significance of the difference in thickness of the ventricular walls?
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This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.