viruses often attach to peripheral protiens and enter the cell as the membrane..folds around the virus forming a vesicle this is an example of?

right atrium = right ventricle = pulmonary arteries =lungs = pulmonary veins =left atrium = left ventricle = aorta.

Explanation:

The impure blood from different parts of the body is brought into the right auricle through the vena cava and pure blood is brought into left auricle through the pulmonary veins.

Hope it will help :)