The human heart has two atria. Where does the left atrium get blood?
Answer Pulmonary circulation
The left atrium gets blood from the pulmonary circulation, while the right one is from the venae cavae of the systemic circulation. Each atrium is essentially cube-shaped, with the exception of an ear-shaped extension known as an atrial appendage or auricle.
Asked by Vasilii Kulev · Last updated 3 years ago · 1.2K views · SOURCE
