Question

Describe the location of the following with regards to fetal circulation: foramen ovale, ductus arteriosus, ductus venous, umbilical arteries, umbilical veins. What do each of these structures become in the adults? Which of these structures bypasses the fetal liver? Which structures help blood bypass tje fetal lung? Is. lood in tje imbilical arteries oxygenated or deoxygenated?

Answer 1

Answer-

Location of foramen ovale- Foramen ovale is a small hole located in the septum, which is wall between two atrium(right and left)  

Location of ductus arteriosus- Ductus arteriosus shown in the heart on the right,it is an abnormal opening locate between the aorta and pulmonary artery.

Location of ductus venosus- Ductus venosus describe the vitelline blood vessel lying within the liver that connects the portal and placental(umbilical vein) to inferior vena cava.

Location of umbilical arteries- the umbilical artery is a paired artery that is found in abdominal and pelvic region.

Location of umbilical veins- it is located either within the umbilical cord or within the fetal abdomen, inferior to the fetal liver and close to anterior abdominal wall.

In adults foramen ovale change into fossa ovalis.

In adults ductus arteriosus change into ligamentum arteriosum.

In adults ductus venosus change into ligamentum venosum.

In adults umbilical artery change into medial umbilical ligament that represent the remnant of embryonic urachus.

In adults umbilical vein change into fibrous cord called round ligament of liver(also called ligamentum teres hepatis).

- the structure that bypass the fetal liver is Ductus venosus.

-the structure help blood bypass the fetal lung is Foramen ovale.

- in umbilical artery the blood is Deoxygenated carry from fetus to placenta.