🫀🧬

#real heart #sniev #heart valve #yretra #pulmonary vein #heart #right atrium

🟦🩸📥🫀

#vena cava #blue blood #heart input #venous return #deoxygenated blood #right atrium #blood circulation

⬆️➕⬇️🟦🩸➡️🫀

#superior vena cava #inferior vena cava #deoxygenated blood #blood return #sniev #circulatory system #right atrium

🟦🩸➡️🫀

#vena cava #deoxygenated blood #blood return #vein #right atrium