『 🧻 𝐄ᵃᵗʰᵃⁿ 𝐖ᵉᵇᵇᵉʳ 🧻 』 :
The heart functions as a double, continuous muscle pump that beats approximately 100,000 times a day to keep the blood in constant movement throughout the body. Physiologically, this organ is divided into four cavities: two upper chambers called atria, which receive blood, and two lower chambers called ventricles, which expel it. The cycle begins when deoxygenated blood from the entire body returns to the heart through the venae cavae and enters the right atrium. This cavity contracts and pushes blood through the tricuspid valve into the right ventricle, which, upon contracting, sends blood to the lungs via the pulmonary artery, where the blood releases carbon dioxide and is recharged with fresh oxygen. Once oxygenated, the blood returns to the heart through the pulmonary veins and enters the left atrium. From there, it passes through the mitral valve to the left ventricle, which is the thickest and most powerful cavity in the heart, responsible for pumping the blood with great force into the aorta artery to distribute it throughout the body. All this mechanical movement is perfectly coordinated by an intrinsic electrical system that generates its own impulses; electrical travel initiates at the sinus node, the natural pacemaker located in the right atrium, which sends a signal for both atria to contract simultaneously. This current then travels to the atrioventricular node and spreads rapidly through the ventricles through the His bundle and Purkinje fibers, causing ventricular contraction. This cyclic process consists of two main phases: diastole, which is the moment of relaxation where the cavities are filled with blood, and systole, which is the phase of contraction and emptying, thus ensuring an vital flow. IT DOES NOTHING HARD FOR YOU TO COPY AND HIT. ❤️🩹The heart functions as a double, continuous muscle pump that beats approximately 100,000 times a day to keep the blood in constant movement throughout the body. Physiologically, this organ is divided into four cavities: two upper chambers called atria, which receive blood, and two lower chambers called ventricles, which expel it. The cycle begins when deoxygenated blood from the entire body returns to th
2026-08-19 06:43:04