What is Trabeculated part of right ventricle?
What is Trabeculated part of right ventricle?
Truncus Arteriosus Septation The bulbus cordis elongates and forms three parts- the proximal part forms the trabeculated portion of the right ventricle, the middle part forms conus cordis which is the outflow tract and the truncus arteriosus which forms the ascending aorta and pulmonary trunk.
What are the parts of the right atrium?
Parts
- atrial cavity divided into 2 main parts by crista terminalis. smooth muscular ridge from the roof just in front of and below the SVC opening (between SVC and right auricle) and extends along lateral wall to the anterior lip of IVC.
- sinus venarum cavarum. cavity posterior to crista terminalis.
- atrium proper.
What does the bulbus cordis do?
The bulbus cordis (the bulb of the heart) is a part of the developing heart that lies ventral to the primitive ventricle after the heart assumes its S-shaped form. The superior end of the bulbus cordis is also called the conotruncus….
| Bulbus cordis | |
|---|---|
| Latin | Bulbus cordis |
| Anatomical terminology |
What does bulbus cordis become?
The bulbus cordis leads into the truncus arteriosus, which continues a short distance anteriorly before bifurcating into right and left branches, each of which extends anterolaterally and gives rise to three large arteries (Figures 6.15 and 6.17).
What is the function of septomarginal trabecula?
Its main function is to convey the right branch of the atrioventricular bundle of the conducting system. The septomarginal trabecula forms the anteroinferior border between the superior, smooth outflow tract of the ventricle and the trabeculated inflow tract.
What is infundibulum of right ventricle?
The infundibulum (also known as conus arteriosus) is a conical pouch formed from the upper and left angle of the right ventricle in the chordate heart, from which the pulmonary trunk arises. It develops from the bulbus cordis.
Where are the Trabeculae Carneae located?
The trabeculae carneae (columnae carneae, or meaty ridges) are rounded or irregular muscular columns which project from the inner surface of the right and left ventricle of the heart. These are different from the pectinate muscles, which are present in the atria of the heart.
What is the conus Cordis?
The cranial end of the bulbus cordis (also known as the conus cordis) gives rise to the aorta and pulmonary trunk with the truncus arteriosus. This makes its appearance in three portions. Two distal ridge-like thickenings project into the lumen of the tube: the truncal and bulbar ridges.
What is Bulboventricular flange?
In the newly formed bulboventricular loop the primitive right and left ventricles appear as expansions in the heart tube. Externally the interventricular sulcus separates the right and left ventricles and internally they are separated by the bulboventricular flange.
What is Crista terminalis?
The crista terminalis is a smooth ridge of tissue that begins at the roof of the right atrium anterior to the superior vena cava orifice and extends inferiorly to the anterior lip of the inferior vena cava.
