human circulatory system 🫀with biobites,science in small bites

Added: 2026-06-03

[00:00:00]The circulatory system is an incredible network. Blood first enters the heart from the body through the superior and inferior vena cava, flowing straight into the right atrium. From there, it passes through the tricuspid valve and into the right ventricle. The pulmonary artery then carries this deoxygenated blood to the lungs where it mixes with oxygen. Once oxygenated, the blood travels through the pulmonary veins into the left atrium, moves through the mitral valve into the left ventricle, and is finally pumped back out to the rest of the body through the aorta.

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