Your love is a strong, muscular body organ situated slightly to the left of her chest. The pumps blood to all components of the body through a network the blood vessels by repeatedly expanding and also contracting. Top top average, your heart will beat 100,000 times and also pump about 2,000 gallons of blood each day.

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The love is divided into a right and left side, be separate by a septum. Each side has actually an atrium (which receives blood together it enters) and also a ventricle (from which blood is pumped out). The heart has actually a complete of 4 chambers: best atrium, ideal ventricle, left atrium and left ventricle.

The appropriate side that the heart collects oxygen-depleted blood and pumps it come the lungs, through the pulmonary arteries, so the the lungs deserve to refresh the blood with a new supply the oxygen.

The left side of the heart receives oxygen-rich blood from the lungs, then pumps blood out to the remainder of the body"s tissues, through the aorta.

Valves maintain direction of blood flow

As the heart pumps blood, a series of valves open and also close tightly. This valves ensure the blood flows in only one direction, preventing backflow.

The tricuspid valve is situated between the best atrium and also right ventricle.The pulmonary valve is between the right ventricle and also the pulmonary artery.The mitral valve is between the left atrium and left ventricle.The aortic valve is in between the left ventricle and also the aorta.

Each heart valve, except for the mitral valve, has three flaps (leaflets) the open and also close like gates on a fence. The mitral valve has two valve leaflets.

The circulatory system

While the heart and lungs are the biggest organs of the circulatory system, the blood vessels space the longest. This expanded network the stretchy tubes circulates blood throughout the body. To adjust end-to-end, your body"s blood vessels would certainly extend about 60,000 miles. That"s an ext than 21 road trips between new York and also Los Angeles!

Arteries (along with smaller arterioles and also microscopic capillaries) convey oxygen- and also nutrient-rich blood come the body"s tissues. In turn, veins lug nutrient-depleted blood ago to the heart. Along the way, blood is routed through the kidneys and also liver, together well, filtering waste products from the blood.

Electrical impulses store the beat

The heart"s four chambers pump in an organized manner v the aid of electrical impulses the originate in the sinoatrial node (also called the "SA node"). Situated on the wall surface of the appropriate atrium, this small cluster of dedicated cells is the heart"s herbal pacemaker, initiating electric impulses at a regular rate.

The advertise spreads v the walls of the right and also left atria, bring about them to contract, forcing blood right into the ventricles. The impulse climate reaches the atrioventricular (AV) node, i beg your pardon acts as an electric bridge for impulses to take trip from the atria to the ventricles. From there, a pathway of yarn (the HIS-Purkinje network) tote the impulse into the ventricles, which contract and force blood the end of the heart.

Heart anatomy: by the numbers

1. Premium vena cava: receive blood from the top body; delivers blood into the best atrium.

2. Worse vena cava: receives blood indigenous the lower extremities, pelvis and abdomen, and also delivers blood right into the best atrium.

3. Appropriate atrium: receives blood returning to the love from the superior and inferior vena cava; transmits blood come the appropriate ventricle, which pumps blood to the lungs for oxygenation.

4. Tricuspid valve: enables blood to pass from the best atrium come the appropriate ventricle; prevents blood indigenous flowing ago into the ideal atrium as the heart pumps (systole).

5. Best ventricle: obtain blood indigenous the right atrium; pumps blood into the pulmonary artery.

6. Pulmonary valve: enables blood to pass into the pulmonary arteries; prevents blood indigenous flowing ago into the appropriate ventricle.

7. Pulmonary arteries: lug oxygen-depleted blood indigenous the heart to the lungs.

8. Pulmonary veins: deliver oxygen-rich blood native the lungs to the left atrium of the heart.

9. Left atrium: obtain blood return to the love from the pulmonary veins.

10. Mitral valve: enables blood to circulation into the left ventricle; avoids blood indigenous flowing ago into the left atrium.

11. Left ventricle: obtain oxygen-rich blood from the left atrium and also pumps blood into the aorta.

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12. Aortic valve: enables blood to pass from the left ventricle to the aorta; avoids backflow the blood into the left ventricle.