Your heart is an amazing organ. Did you know the fist-sized powerhouse beats 100,000 times per day, pumping 5 or 6 quarts of blood each minute?
, the large artery leaving the heart. Arteries carry oxygen-rich blood away from the heart to all of the body's tissues. They branch several times, becoming smaller and smaller as they carry blood further from the heart and into organs.These are small, thin blood vessels that connect the arteries and the veins.
The heart valves work the same way as one-way valves in the plumbing of your home. They prevent blood from flowing in the wrong direction. When the ventricle is full, the tricuspid valve shuts. This prevents blood from flowing backward into the atria while the ventricle contracts. As the ventricle contracts, blood leaves the heart through the aortic valve, into the aorta and to the body.Once blood travels through the pulmonic valve, it enters your lungs. This is called the pulmonary circulation. From your pulmonic valve, blood travels to the pulmonary artery to tiny capillary vessels in the lungs.
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