Heart | Structure, Function, Diagram, Anatomy, Facts | Britannica Heart, organ that serves as a pump to circulate the blood It may be as simple as a straight tube, as in spiders and annelid worms, or as complex as the four-chambered double pump that is the center of the circulatory system in humans, other mammals, and birds
Heart: Anatomy Function - Cleveland Clinic Your heart contains four muscular sections (chambers) that briefly hold blood before moving it Electrical impulses make your heart beat, moving blood through these chambers
How the Heart Works - What the Heart Looks Like | NHLBI, NIH Blood flows from the body and lungs to the atria and from the atria to the ventricles The ventricles pump blood out of the heart to the lungs and other parts of the body An internal wall of tissue divides the right and left sides of your heart This wall is called the septum
Heart - Wikipedia Because the heart is between the lungs, the left lung is smaller than the right lung and has a cardiac notch in its border to accommodate the heart [8] The heart is cone-shaped, with its base positioned upwards and tapering down to the apex [8] An adult heart has a mass of 250–350 grams (9–12 oz) [16]
19. 1 Heart Anatomy - Anatomy and Physiology 2e | OpenStax Our exploration of more in-depth heart structures begins by examining the membrane that surrounds the heart, the prominent surface features of the heart, and the layers that form the wall of the heart