1. The heart is a cone-shaped organ located within the _____________ of the chest. 

2. The ________________ consists of two layers, filled with a fluid, around the heart. 

3. The interior lining of the heart chambers is the ________________.

4. The _____________ pumps blood to the lungs. 

5. The _____________ pumps blood to the body; it's the strongest chamber of the heart. 

6. A rapid (> 100 beats/min.) is known as _______________. 

7. The middle layer, of heart muscle itself, is known as the _______________.

8. The heart is about the size of your _______________. 

9. The _____________ takes in blood from the superior and inferior vena cavae. 

10. The _____________ takes in blood from the 4 pulmonary veins. 

11. The _____________________ is the body's largest artery. 

12. The heart rate of a __________________ is the fastest. 

13. The _________________ valve is between the left atrium and left ventricle. 

14. A malfuntioning, incompetant __________ can lead to the backflow of blood. 

15. The _________________ valve is between the right ventricle and the pulmonary trunk. 

16. Epinephrine causes the heart rate to ______________. 

17. The _________________ valve is between the right atrium and the right ventricle. 

18. The tricuspid and mitral valves are also known as ____________ valves.

19. The papillary muscles pull on the _______________ to open the AV valves. 

20. A blockage of a coronary artery can lead to a ______________.

Number the following steps of the path of blood through the heart in their correct order.
     (I've done the first and last steps)

__1_ deoxygenated blood from the body passes into the superior & inferior vena cava
____ blood enters the pulmonary arteries 
____ blood enters the right ventricle
____ blood reaches the lungs 
____ blood enters the left atrium 
____ blood passes thru the bicuspid valve
____ blood passes thru the pulmonary veins
____ blood passes thru the pulmonary semilunar valve 
____ blood enters the pulmonary trunk 
____ blood enters the right atrium
____ blood enters the aorta 
____ blood passes thru the tricuspid valve
____ blood passes thru the aortic semilunar valve 
____ blood enters the left ventricle
_15_ blood goes to the body _____________________________________________________________________________

LABEL THE FOLLOWING.

Front view of the heart (WS p. 440)

Arteries/Veins of the heart (WS p. 441)