Question

1. list in order the structures that blood flows through when circulating through the heart and lungs.

1.
2.
3.
4.
5.
6.
7.
8.
9.

Explanation:

Blood circulation through heart and lungs involves the right - side of the heart pumping de - oxygenated blood to lungs for oxygenation, and then oxygenated blood returning to the left - side of the heart. The main structures involved follow a specific sequence.

Answer:

1. Right atrium
2. Tricuspid valve
3. Right ventricle
4. Pulmonary semilunar valve
5. Pulmonary arteries
6. Lungs (pulmonary capillaries)
7. Pulmonary veins
8. Left atrium
9. Mitral (bicuspid) valve
10. Left ventricle (Note: There were 9 blanks but the full sequence has 10 main steps. The last step of left ventricle is where oxygenated blood is pumped out to the body but was not included in the blanks strictly, yet for full understanding of the cycle it's important to mention.)