The heart is a muscular organ in most animals, which pumps blood through the blood vessels of the circulatory system. The pumped blood carries oxygen and nutrients to the body, while carrying metabolic waste such as carbon dioxide to the lungs. In humans, the heart is approximately the size of a closed fist and 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. Commonly the right atrium and ventricle are referred together as the right heart and their left counterparts as the left heart. Fish, in contrast, have two chambers, an atrium and a ventricle, while reptiles have three chambers. In a healthy heart blood flows one way through the heart due to heart valves, which prevent backflow. The heart is enclosed in a protective sac, the pericardium, which also contains a small amount of fluid.
| System | Circulatory |
| Artery | Aorta, pulmonary trunk and right and left pulmonary arteries, right coronary artery, left main coronary artery |
| Vein | Superior vena cava, inferior vena cava, right and left pulmonary veins, great cardiac vein, middle cardiac vein, small cardiac vein, anterior cardiac veins |
| Nerve | Accelerans nerve, vagus nerve |
| Latin | cor |
| Greek | kardía (καρδία) |
关于Heart
Hard rock group influenced by heavy metal and folk music that earned top 10 albums on the Billboard 200 in the 1970s, 1980s, 1990s, and 2010s. They were inducted into the Rock and Roll Hall of Fame in 2013 and are known for iconic singles such as "Crazy on You," "Magic Man" and "Barracuda."
Heart的成就
They were formed from the existing band White Heart. They initially found success after moving to Canada to avoid the draft. They disbanded in 1998 and came back together in 2002. In 2019, they ended their 2016 acrimonious break-up with a tour called "Love Alive."
您不知道Heart的热门事实
Heart Category.. Organs (anatomy).. Cardiac anatomy.
