Lesson 11.1 Crossword
Across
1. | second largest vein in the body that returns deoxygenated blood to the right atrium of the heart from the upper half of the body |
6. | the period of relaxation in the heart when the chambers are filling with blood |
7. | the middle layer of the heart, which makes up about 2/3 of the heart muscle |
8. | the outermost layer of the heart and the innermost layer of the pericardial sac |
9. | largest vein in the human body that returns deoxygenated blood to the right atrium of the heart from body regions below the diaphragm |
12. | one of the small muscular bundles attached at one end to the chordae tendineae and at the other to the innermost or endocardial wall of the ventricles; maintains tension on the chordae tendineae as the ventricle contracts |
13. | the valve that closes the orifice between the left atrium and left ventricle of the heart; bicuspid valve |
14. | thick wall that divides the two ventricles in the heart |
Down
2. | the innermost layer of the heart, which lines the interior of the heart chambers and covers the valves of the heart |
3. | the semilunar valve between the left ventricle and the aorta that prevents blood from flowing back into the left ventricle |
4. | the amount of blood pumped from the heart per minute |
5. | widening of the blood vessels, which increases blood flow |
10. | a large arterial trunk that arises from the base of the left ventricle and channels blood from the heart into other arteries throughout the body |
11. | a period of contraction when the chambers are pumping blood out of the heart |