In the fetal heart it was called ductus arteriosis.
ligamentum arteriosum
the fossa ovalis was the foramen ovale and the ligamentum arteriosum was the ductus arteriosus. They each contributed to shunting blood away from the non-functional lungs in the fetus.
A foramen ovale is both a hole in the skull through which nerves pass and a fetal shunt between chambers of the heart. The ligamentum arteriosum is the connective tissue between the pulmonary artery and the aortic arch and is a closed vestige of a fetal duct known as the ductus arteriosus.
In the heart.
The ligmentum arteriosum is the remnant of the ductus arteriosus in the fetal heart. The fossa ovalis is the remnant of the foramen ovale.
Fossa ovalis and ligamentum. Fossa ovalis -> foramen lovale Ligamentum-> Ductus arteriosus
The foramen ovale is the name given to the septal opening in the fetal heart which connects the two atria, whereas the ligamentum arteriosum is the remnants of the ductus arteriosus (which is the structure that connects the pulmonary trunk to the aorta in the fetus). The pressure in the lungs during the first breath, postnatally, causes blood to flow through the pulmonary artery and the ductus arteriosus regresses to a filled in tube, the ligamentum arteriosum.
An enlarged fetal heart is called fetal cardiomegaly. Fetal cardiomegaly is a symptom of a number of congenital heart defects including tricuspid artesia, Ebstein anomaly, or twin transfusion syndrome.
what are fetal heart
It is the remnant of ductus arteriosus a blood vessel which bypassed the blood to the heart in foetus as the lungs are not functioning till the child is born. After birth once the lungs start functioning, it starts to close and is completely closed by second month.
Because the fetal lungs are inactive, the pulmonary circuit is bypassed. Half of the blood that enters the right atrium flows directly into the left atrium through the foramen ovale. The remainder flows from the right atrium to the right ventricle, then into the pulmonary trunk. The second bypass, the ductus arteriosus, transports the blood directly from the pulmonary artery into the aorta so it can be sent into systemic circulation.
In the fetal hear the fossa ovalis was known as the foramen ovale, which allows blood to pass from the right to the left atrium, thus bypassing the fetal lungs.