how the heart works - Robuta Search

https://vascularsurgery.ucsf.edu/condition/how-heart-works How the Heart Works | UCSF Department of Surgery Your heart is a muscular organ that acts like a pump to continuously send blood throughout your body. Your heart is at the center of your circulatory how the heart works department of ucsf surgery https://www.nhlbi.nih.gov/health/heart/blood-flow How the Heart Works - How Blood Flows through the Heart | NHLBI, NIH Oxygen-poor blood from the body enters your heart through two large veins called the superior and inferior vena cava. The blood enters the heart's right atrium... how the heart works blood flows nhlbi nih