In human heart blood returning from lungs first drains into the _____?

انسانی دل میں پھیپھڑوں سے لوٹنے والا خون پہلے _____ میں جاتا ہے؟

Left atrium

Left ventricle

Right atrium

Right ventricle

In the human heart, blood returning from the lungs via the pulmonary veins drains into the left atrium.
From there, it flows through the mitral valve into the left ventricle, which pumps it out to the rest of the body through the aorta.