The heart lies in the mediastinum, between the pleura of the lungs. The pulmonary circulation, a circuit
of its own, carries blood from the heart to the lungs and back. Understanding blood circulation in the
body will make learning heart anatomy more efficient.
The blood enters the heart through the superior and inferior vena cava into the first chamber, the right
atrium. The systemic circulation, or the major circulation, is the circulation in which the left ventricle
pumps blood to the body.
Arteries contain blood without oxygen, while veins contain blood with oxygen. The right margin or right
border is the only margin of the heart, lying between the sternocostal surface and diaphragmatic
surface. Right atrium lies in this area. To understand the full anatomy of the right atrium, we need to
examine all six walls of it. The opening for the inferior vena cava can be found on the posterior wall.
There is a line separating the pectinate muscle and the sinus venarum. The posterior wall displays a
valve, which is known as the valve for the inferior vena cava. This valve was developed during fetal life,
enabling blood to flow directly from the inferior cava to a hole on the medial wall. The tricuspid valve
guards the right atrioventricular opening and consists of three cusps that each have three margins
attached to the tendinous chords.
The trabeculae carneae play a vital role in preventing blood from swirling around in the heart. This
internal layer also prevents blood from getting air bubbles as they reach a sudden break which could
cause a potential air embolism. The pulmonary valve consists of a fibrous ring, and the free margins are
directed upward into the pulmonary artery. The nodules of the semilunar valve, located in the center of
the free borders, ensure secure valve closure.
The sinus of the pulmonary trunk is identifiable. This trunk is another term for the pulmonary artery. The
anterior wall of the left atrium is structured by the right auricle, which is a muscular pouch that contains
pectinate muscle.
From these two angles, we are able to see the left atrioventricular opening and the aortic opening,
which leads into the aorta. And if we tilt it a little bit in this direction, you will see one more valve. Let's
of its own, carries blood from the heart to the lungs and back. Understanding blood circulation in the
body will make learning heart anatomy more efficient.
The blood enters the heart through the superior and inferior vena cava into the first chamber, the right
atrium. The systemic circulation, or the major circulation, is the circulation in which the left ventricle
pumps blood to the body.
Arteries contain blood without oxygen, while veins contain blood with oxygen. The right margin or right
border is the only margin of the heart, lying between the sternocostal surface and diaphragmatic
surface. Right atrium lies in this area. To understand the full anatomy of the right atrium, we need to
examine all six walls of it. The opening for the inferior vena cava can be found on the posterior wall.
There is a line separating the pectinate muscle and the sinus venarum. The posterior wall displays a
valve, which is known as the valve for the inferior vena cava. This valve was developed during fetal life,
enabling blood to flow directly from the inferior cava to a hole on the medial wall. The tricuspid valve
guards the right atrioventricular opening and consists of three cusps that each have three margins
attached to the tendinous chords.
The trabeculae carneae play a vital role in preventing blood from swirling around in the heart. This
internal layer also prevents blood from getting air bubbles as they reach a sudden break which could
cause a potential air embolism. The pulmonary valve consists of a fibrous ring, and the free margins are
directed upward into the pulmonary artery. The nodules of the semilunar valve, located in the center of
the free borders, ensure secure valve closure.
The sinus of the pulmonary trunk is identifiable. This trunk is another term for the pulmonary artery. The
anterior wall of the left atrium is structured by the right auricle, which is a muscular pouch that contains
pectinate muscle.
From these two angles, we are able to see the left atrioventricular opening and the aortic opening,
which leads into the aorta. And if we tilt it a little bit in this direction, you will see one more valve. Let's
