BONUS B: Give two reasons how you know the circled vessel is a vein. (Worth 2 bonus points)   

12. This artery arrow #39 points to is the:   

2. This artery #29 is the:       

Bonus B – What is the general name for this fluid-filled sac around the heart? (worth 2.5 points)    

10. The area marked #23 on the sheep heart is the:   

11. Based on the thickness of its muscle, chamber #24 is the:      

15. These muscles that the white arrows are pointing to are called:    

3. The valve labeled 16 is the:         

13. What is the universal donor blood type that can donate to all other blood types?           

1. The arrow is pointing to a: