Biology - Body Fluids and Circulation Question with Solution | TestHub
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): Ligamentum arteriosum joins pulmonary trunk and aortic arch.
Reason (R): It is the remnant of fossa ovalis.
In light of the above statements, choose thecorrectanswer from the options given below.
Options:
Answer:
Solution:
Ligamentum arteriosum is a small ligament that connects the pulmonary trunk to the aortic arch. It is the remnant of the ductus arteriosus, which is a temporary fetal blood vessel that connects the pulmonary artery to the aorta.
The fossa ovalis is a depression in the right atrium of the heart, which is the remnant of a thin fibrous sheet that covered the foramen ovale during fetal development.
Therefore, Assertion (A) is true but Reason (R) is false.
Answer: (A) is true but (R) is false.
