Biology in the background The heart is mainly made up of muscle tissue that pushes blood throughout the body. In mammals, including humans, this muscle is divided into four chambers: two ventricles ...

The septum's job is to separate the left side and the right side of the heart. The atria and ventricles work as a team — the atria fill with blood, then dump it into the ventricles. The ventricles ...

The right ventricle pumps blood to the lungs, and the left ventricle pumps blood to all other organs. The two atria (right and left) accept the blood returning to the heart (from the body’s tissues ...

This is the lub sound you hear. It then pauses at the atrioventricular (AV) node which sits between the atria and ventricle before being relayed across the ventricle, causing it to contract.

Each side of the heart is made up of two chambers — the upper atria and the lower ventricles. The ventricles do the bulk of the work, but the atria are important in priming the pump or making ...

The top two chambers — the left and right atria — receive blood. The bottom two chambers — the left and right ventricles — pump blood from the heart. An individual who has bradycardia may ...

AV canal is also called atrioventricular septal defect or endocardial cushion defect. A baby with a complete AV canal has an ASD, a VSD, and a large common valve between the atria and ventricles. A ...

Your heartbeat is controlled by an electrical system. It makes the upper chambers (atria) and lower chambers (ventricles) of your heart work together to pump blood around the body. If you have atrial ...

This heart organoid has atria- and ventricle-like structures and also exhibits beating movement. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to ...

This represents the time that it takes for the electrical impulse generated in the sinus node to travel through the atria and across the atrioventricular node to the ventricles. The normal PR ...