Chapter 20, Problem 6TYR

These are some of the points that the blood passes as it circulates through the heart chambers, listed alphabetically: (1) left atrium, (2) left ventricle, (3) mitral valve, (4) pulmonary valve, (5) right atrium, (6) right ventricle, (7) tricuspid valve. Place these in the correct order from the time that blood enters the heart from the venae cavae to the time blood leaves the heart by way of the arota.

1. 1-3-2-4-5-7-6
2. 1-2-3-5-7-6-4
3. 5-3-6-4-1-2-7
4. 6-7-5-4-2-3-1
5. 5-7-6-4-1-3-2