Respuesta :

CadenS
It’s very complicated and not as easy as that. Primarily, the aorta, pulmonary veins and arteries, and superior and inferior vena cava are the main passageways in and out of the heart

Answer:

Primarily, the aorta, pulmonary veins and arteries, and superior and inferior vena cava are the main passageways in and out of the heart.