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Picgif heavy heart animated
Picgif heavy heart animated












picgif heavy heart animated

The heart receives blood low in oxygen from the systemic circulation, which enters the right atrium from the superior and inferior venae cavae and passes to the right ventricle. These generate a current that causes contraction of the heart, traveling through the atrioventricular node and along the conduction system of the heart. The wall of the heart is made up of three layers: epicardium, myocardium, and endocardium.The heart pumps blood with a rhythm determined by a group of pacemaking cells in the sinoatrial node. The heart is enclosed in a protective sac, the pericardium, which also contains a small amount of fluid. In a healthy heart blood flows one way through the heart due to heart valves, which prevent backflow. Fish, in contrast, have two chambers, an atrium and a ventricle, while reptiles have three chambers. Commonly the right atrium and ventricle are referred together as the right heart and their left counterparts as the left heart. In humans, the heart is located between the lungs, in the middle compartment of the chest.In humans, other mammals, and birds, the heart is divided into four chambers: upper left and right atria and lower left and right ventricles. Blood provides the body with oxygen and nutrients, as well as assisting in the removal of metabolic wastes.

picgif heavy heart animated

The heart is a muscular organ in most animals, which pumps blood through the blood vessels of the circulatory system.














Picgif heavy heart animated