The base is formed by the heart atria L / R which are separated by a ventricular surrounding the coronary, containing the main trunk of the coronary vessels.
The atria are joined in a U-shaped formation that involves the origin of the aorta, the training is interrupted where each atrial appendage ends in a free, atrium.
The ventricles are a much larger part of the heart and the walls are stronger due to its greater thickness, have internal ridges that follow toward the apex (sinuous ridge and groove paraconal), both accompanying vessels leading edges of the interventricular septum. The coronary arteries extend for a distance on the ventricular surface.
The Right Atrium
Forms a chamber (sinus venosus), where the main flow into systemic veins. The Vena Cava Flow enters the chamber above the caudodorsal this came much lower (CS) that drains the heart. The Cranial Vena Cava opens craniodorsalmente the crista terminalis. The atrium is smooth between the venous entry, enter its roof penetrates the openings of the arches, and jagged by the passage of the pulmonary veins that return on the right atrium and enter the left atrium. Within the atrium will have a series of ridges (pectinados muscles), which branch terminal crest, marking the boundary between the atrium and the main compartment.
The Left Atrium
Has a similar manner, receives the pulmonary veins that are used, separately or in groups, two or three places. The atrium is similar to the right.
The Right Ventricle
It has crescent-shaped in cross section. It is divided by a muscular bundle (supraventricular crest), which protrudes from the ceiling to the cranial atrioventricular ostium. The main part of the chamber is located in this large elongated opening, while the extension to the left, the conus arteriosus, leads directly to the output ring much less in the pulmonary trunk. The right atrioventricular valve (tricuspid) is composed of three flaps or cusps that attach to a fibrous ring that surrounds the opening.
The cusps merge in their attachment, but separate to the center of the opening, where their free edges are thick and irregular. Each cusp is joined by streaks (chordal) that go down the ventricular cavity and projections fall into the wall (papillary muscles). This arrangement prevents the protrusion of the leaflets into the atrium during ventricular contraction (systole). The light from the ventricle is traversed by a thin band of muscle (trabecula septomarginal) connecting the outer wall of the septal wall. Gives a shorter path to a beam conducting tissue, thereby ensuring a simultaneous contraction of all parts of the ventricle. A further modification of the muscle is produced by many irregular crests (trabeculae crneas), which provide the bottom wall of a spongy. These trabeculae reduce blood turbulence. The opening in the pulmonary artery is located at a more dorsal and atrioventricular orifice which is the source of the cranial aorta. Is closed during ventricular relaxation (diastole) the backflow of blood, while forcing the three cusps which are the pulmonary valve. Semilunar cusps are concave on the side adjusting pressure when the valve closes.
The Left Ventricle
It is circular to cut and form the apex of the heart as a whole. Its wall will be much thicker with respect to the right ventricle, according to which performs more work. The left atrioventricular valve (bicuspid or mitral), I close the atrioventricular ostium, has two main cusps comparable to the right.
The exit to the aorta assumes a more central position in the heart. The aortic valve, generally similar to the pulmonary valve, has a different orientation of their leaflets. The nodular thickening at the free edges of the aortic cusps are conspicuous.
The atria are joined in a U-shaped formation that involves the origin of the aorta, the training is interrupted where each atrial appendage ends in a free, atrium.
The ventricles are a much larger part of the heart and the walls are stronger due to its greater thickness, have internal ridges that follow toward the apex (sinuous ridge and groove paraconal), both accompanying vessels leading edges of the interventricular septum. The coronary arteries extend for a distance on the ventricular surface.
The Right Atrium
Forms a chamber (sinus venosus), where the main flow into systemic veins. The Vena Cava Flow enters the chamber above the caudodorsal this came much lower (CS) that drains the heart. The Cranial Vena Cava opens craniodorsalmente the crista terminalis. The atrium is smooth between the venous entry, enter its roof penetrates the openings of the arches, and jagged by the passage of the pulmonary veins that return on the right atrium and enter the left atrium. Within the atrium will have a series of ridges (pectinados muscles), which branch terminal crest, marking the boundary between the atrium and the main compartment.
The Left Atrium
Has a similar manner, receives the pulmonary veins that are used, separately or in groups, two or three places. The atrium is similar to the right.
The Right Ventricle
It has crescent-shaped in cross section. It is divided by a muscular bundle (supraventricular crest), which protrudes from the ceiling to the cranial atrioventricular ostium. The main part of the chamber is located in this large elongated opening, while the extension to the left, the conus arteriosus, leads directly to the output ring much less in the pulmonary trunk. The right atrioventricular valve (tricuspid) is composed of three flaps or cusps that attach to a fibrous ring that surrounds the opening.
The cusps merge in their attachment, but separate to the center of the opening, where their free edges are thick and irregular. Each cusp is joined by streaks (chordal) that go down the ventricular cavity and projections fall into the wall (papillary muscles). This arrangement prevents the protrusion of the leaflets into the atrium during ventricular contraction (systole). The light from the ventricle is traversed by a thin band of muscle (trabecula septomarginal) connecting the outer wall of the septal wall. Gives a shorter path to a beam conducting tissue, thereby ensuring a simultaneous contraction of all parts of the ventricle. A further modification of the muscle is produced by many irregular crests (trabeculae crneas), which provide the bottom wall of a spongy. These trabeculae reduce blood turbulence. The opening in the pulmonary artery is located at a more dorsal and atrioventricular orifice which is the source of the cranial aorta. Is closed during ventricular relaxation (diastole) the backflow of blood, while forcing the three cusps which are the pulmonary valve. Semilunar cusps are concave on the side adjusting pressure when the valve closes.
The Left Ventricle
It is circular to cut and form the apex of the heart as a whole. Its wall will be much thicker with respect to the right ventricle, according to which performs more work. The left atrioventricular valve (bicuspid or mitral), I close the atrioventricular ostium, has two main cusps comparable to the right.
The exit to the aorta assumes a more central position in the heart. The aortic valve, generally similar to the pulmonary valve, has a different orientation of their leaflets. The nodular thickening at the free edges of the aortic cusps are conspicuous.
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