The pulmonary artery and its branches deliver blood rich in carbon dioxide (and lacking in oxygen) to the capillaries that surround the air sacs. The circulation of the blood through the lungs. The veins that return the oxygenated blood from the lungs to the left atrium of the heart.
Answer:
i think 2 or 3 i dont really know.
Explanation:
The best time to be treated for STI. A person should seek testing/treatment the first moment the suspect having STI
