Understand the structure of the heart from the heart model！

The Ronten heart model is a simulated medical human body model. It is an adult heart model. The model is in a diastolic state. It is placed on a stent and can be rotated horizontally. Along the bottom of the coronary sulcus, a section of the anterior wall of the ventricle is made to show the internal structure of the left and right ventricles. The epicardium has been removed, showing the direction of the myocardial fibers and the heart vortex. The heart model is used in middle school physiology, health, and medical schools. It is an intuitive teaching aid when explaining the structure of the heart. , to help students understand the external shape and internal structure of the heart, as well as the relationship between the large blood vessels entering and leaving the heart and blood circulation.
heart model structure
1. Make two sections, one along the root of the pulmonary artery, exposing the internal structure of the left and right atrium, and the other along the lower part of the coronary sulcus, as a section of the anterior wall of the ventricle, showing the internal structure of the left and right ventricles, the epicardium has been removed, showing the direction of myocardial fibers and Heart Vortex.
2. The outline part shows the coronary sulcus, and the top of the sulcus is the bottom of the heart, including the atrium, the atrial appendage, and the great blood vessels that enter and exit the heart. The anterior sulcus of the anterior and posterior ventricles is the boundary between the left and right ventricles. The major blood vessels that enter and exit the heart are the superior and inferior vena cava, the pulmonary vein, the pulmonary artery, the aorta, and three blood vessels from the aortic arch. (From right to left is the brachiocephalic trunk, right common carotid artery, left subclavian artery), the blood vessels that nourish the heart include left and right coronary arteries, small cardiac veins, cardiac veins, great cardiac veins and coronary sinus.
3. The internal structure mainly shows four hearts:
A: Right atrium: shows the openings of the superior tricuspid valve, inferior vena cava and coronary sinus at the border of the right atrioventricular orifice of the pectineus muscle of the right atrial appendage.
B: Right ventricle: showing the three semilunar valves of the pulmonary artery at the outlet of the pulmonary artery, the chordae tendineae, the papillary muscle and the septum.
C: Left atrium: showing the pectinate muscle of the left atrial appendage, the openings of the four pulmonary veins, and the mitral valve at the edge of the left atrioventricular orifice.
D: Left ventricle: showing the three aortic lunar valves at the outlet of the aorta and the outlet of the coronary arteries, the chordae tendineae, the sarcoid and the papillary muscles.
4. There is an atrial septum between the left and right atria, with an egg garden fossa on it, and a ventricular septum between the left and right ventricles. The membranous part and the muscular part are shown on the septum.

shape of the heart
The heart is located in the chest cavity, above the diaphragm, between the two lungs, about 2/3 to the left of the midline and 1/3 to the right. The heart is a hollow organ mainly composed of the myocardium. It is the size of a fist and is conical. The heart is divided into the apex and the bottom of the heart. The apex of the heart is toward the left, anterior and lower, which is the free end; the bottom of the heart is toward the right, posterior and upper, and is connected to the great blood vessels (aorta, pulmonary artery, vena cava, and pulmonary vein), which fix the heart in the thoracic cavity. There are three shallow grooves on the surface of the heart. Near the bottom of the heart, there is an annular coronal sulcus that separates the atrium from the ventricle. There are two longitudinal shallow grooves from the coronary sulcus, one of which runs from the front of the heart (sternocostal plane) to the right side of the apex, called the anterior interventricular groove. The other is called the posterior interventricular sulcus from the diaphragm of the heart down to the right side of the apex. The anterior and posterior interventricular grooves are the boundary between the left and right ventricles on the surface of the heart. The blood vessels of the heart pass through both the coronary sulcus and the interventricular sulcus.