what is the four main parts of the heart?

Question

what is da four main parts of the heaaart

Answer 1

Right atrium
Right Ventricle
Left atrium
Left Ventricle

or Sinoatrial node
Atrioventricular node
Bundle Branches
Purkinje Fibers

or Mitral valve
Tricuspid valve
Pulmonic valve
Atrial valve

or The Vena cava
Pulmonary artery
Pulmonary vein
Aorta

Answer 2

The main parts of the heart are the chambers, the valves, and the electrical nodes.

Heart Chambers: There are two different types of heart chambers. The first is the atrium (plural is atria), which receives blood returning to the heart through the veins. The right atrium pumps blood to the right ventricle, and the left atrium pumps blood into the left ventricle. This blood is then pumped from the atrium into the second chamber called the ventricle. The ventricles are much larger than the atria and their thick, muscular walls are used to forcefully pump the blood from the heart to the body and lungs (or gills). See illustration below.

Valves: The valves found within the heart are situated between the atria and ventricles, and also between the ventricles and major arteries. These valves are opened and closed by pressure changes within the chambers, and act as a barrier to prevent the backflow of blood. The characteristic "lub-dub, lub-dub" heart sounds heard through a stethoscope are the result of vibrations caused by the closing of the respective valves.

Electrical Nodes: There are two different electrical nodes, or groups of specialized cells, located in the cardiac tissue. The first is the sinoatrial (SA) node, commonly called the pacemaker. The pacemaker is embedded in the wall of the right atrium. This small patch of tissue experiences rhythmic excitation and the impulse rapidly spreads throughout the atria, causing a muscular contraction and the pumping of blood from the atria to the ventricles. The other node, the atrioventricular (AV) node, relays the impulse of the SA node to the ventricles. It delays the impulse to prevent the ventricles from contracting at the same time as the atria, thus giving them time to fill with blood. The cycle of contraction of the heart muscle is called a heartbeat, the rate of which varies greatly between organisms. The following table gives the average heart rates of some common mammals.

Answer 3

Right and Left Atria, Right and Left Ventricles.

Answer 4

Right Atrium n ventrical
Left Atrium n ventrical

Answer 5

there are the 2 upper chambers and the 2 lower chambers...the atrium and ventricals

Answer 6

right atria, right ventricle, left atria, and left venticle.

Answer 7

the four parts are heart,blood,blood vessels and the nerves