hjertehulerne
Hjertehulerne refers to the chambers of the heart. The human heart has four chambers: two atria and two ventricles. The atria are the upper two chambers, which receive blood. The right atrium receives deoxygenated blood from the body, and the left atrium receives oxygenated blood from the lungs. The ventricles are the lower two chambers, which pump blood out. The right ventricle pumps deoxygenated blood to the lungs, and the left ventricle pumps oxygenated blood to the rest of the body.
The atria are separated by the interatrial septum, and the ventricles are separated by the interventricular
In other vertebrates, the number and structure of heart chambers can vary. Fish have a two-chambered heart,