Question

LAB 3 Anatomy and Physiology II sides, preventing the mix- entricular valves are located be Part III: Internal Anatomy of the Heart A A wall like septum sparates the heart into right and left sides, preven b acklow ing of oxygenated and deoxygenated blood. A series of valves prevents in of blood as it moves through the heart. The atrioventricular valves are loca ween the atria and ventricles. The tricuspid valve lies between the right atrin the right ventricle: the bicuspid (mitral) valye lies between the left atrium and ventricle Stringy fibrous chordae tendineae attach to the cusps of the valve to papillary muscles in the heart wall. The papillary muscles contract to hold Wood from atrioventricular valves in the closed position, preventing backflow of blood the ventricles into the atria when the ventricles contract. The semilunar valves located at the exit of the ventricles and their attached vessels, preventing the back flow of blood into the ventricles. The aortic valve lies between the left ventricle and the opening to the aorta. The pulmonary valve lies between the right ventricle and the opening to the pulmonary trunk Label the internal structures of the heart in Figure 3-4. You will also be required to identify each structure on models of the human heart. Refer to your textbook as a guide. 17 -3 (chamber) (chamber) 14 (chamber) 10 -8 (chamber) Hayden-McNeil, LLC Figure 3-4. Frontal section of the heart.

Answer 1

1. Aorta

2. Pulmonary trunk

3. Left Atrium

4. Bicuspid Valve

5. Pulmonary Valve

6. Papillary muscle

7. Interventricular Septum

8. Left Ventricle

9. Inferior Vena Cava

10. Right Ventricle

11. Chordae Tendinae

12. Tricuspid Valve

13. Fossa Ovalis

14. Right Atrium

15. Superior Vena Cava

16. Aortic valve

17. Ligamentum Arteriosum

18. Trabeculae Carneae