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2. Anatomy of the human heart - Wikipedia

   en.wikipedia.org/wiki/Anatomy_of_the_human_heart

   The heart is a muscular organ situated in the mediastinum.It consists of four chambers, four valves, two main arteries (the coronary arteries), and the conduction system. The left and right sides of the heart have different functions: the right side receives de-oxygenated blood through the superior and inferior venae cavae and pumps blood to the lungs through the pulmonary artery, and the left ...

3. Ventricle (heart) - Wikipedia

   en.wikipedia.org/wiki/Ventricle_(heart)

   7100. Anatomical terminology. [edit on Wikidata] A ventricle is one of two large chambers located toward the bottom of the heart that collect and expel blood towards the peripheral beds within the body and lungs. The blood pumped by a ventricle is supplied by an atrium, an adjacent chamber in the upper heart that is smaller than a ventricle.

4. Cardiac cycle - Wikipedia

   en.wikipedia.org/wiki/Cardiac_cycle

   See media help. The cardiac cycle is the performance of the human heart from the beginning of one heartbeat to the beginning of the next. [1] It consists of two periods: one during which the heart muscle relaxes and refills with blood, called diastole, following a period of robust contraction and pumping of blood, called systole. [1]

5. File:Simple 4-quadrant heart curve.svg - Wikipedia

   en.wikipedia.org/wiki/File:Simple_4-quadrant...

   Simple 4-quadrant heart curve.svg. Mathematically simple heart shape. Some have come up with advanced and complex algebraic or trigonometric equations to approximate the heart/love symbol. This image instead uses two simple perpendicular straight lines and two partial circular arcs. Mathematically, x and y are related by the following four ...

6. Heart development - Wikipedia

   en.wikipedia.org/wiki/Heart_development

   The heart tube continues stretching and by day 23, in a process called morphogenesis, cardiac looping begins. The cephalic portion curves in a frontal clockwise direction. The atrial portion starts moving in a cephalically and then moves to the left from its original position. This curved shape approaches the heart and finishes its growth on ...

7. Play Hearts Online for Free - AOL.com

   www.aol.com/games/play/masque-publishing/hearts

   Weather. Fox Weather. Hurricanes' impact on elections. Enjoy a classic game of Hearts and watch out for the Queen of Spades!