Question

The connection between pulmonary and aortic arches in foetuses is

• A. Ligamentum teres
• B. Ductus arteriosus
• C. Foramen ovale
• D. All of the above

Answer 1

The correct option is B

Ductus arteriosus

Ligamentum teres is just round ligament found at multiple places in the body (ex: round ligament of uterus, of liver)

Ductus arteriosus is a connecting vessel between pulmonary artery and proximal descending aorta, present during foetal development. It later gets obliterated and gets closed.

Foramen ovale is a connection between right and left atrium of foetal heart. Gets closed subsequently.