What's the answer?
transfer waste-filled blood from tissues into the pulmonary circulation.

the right side of the heart transfer waste filled and deoxygenated blood into pulmonary circuation The right atrium of the heart (the right part of heart's upper chamber) sends deoxygenated blood to the right ventricel (the right part of the heart's lower chamber) and pumps it to the pulmonary circulation through the artery

Air goes past the epiglottis and into the trachea when you breathe in. from there, it goes to your vocal cords in the larynx until it reaches the bronchi. from the bronchi, air passes into each lung.