Chapter: Respiration and Circulation· Biology

Name the connection between pulmonary trunk and aortic arch representing remnant of embryonic ductus arteriosus.

Q.2 (v) Name the connection between pulmonary trunk and aortic arch representing remnant of embryonic ductus arteriosus.

Doubtly Asked 29 Oct 2026 Board exam · July 2024 hsc 12th Save WhatsApp Report

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Answer: Ligamentum arteriosum.

In the foetus the ductus arteriosus shunts blood from the pulmonary trunk into the aortic arch, bypassing the non-functional lungs. After birth it closes and becomes a fibrous cord, the ligamentum arteriosum.

Doubtly AI · 29 Oct 2026 AI-verified · Nov 2026 Report

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Name the connection between pulmonary trunk and aortic arch representing remnant of embryonic ductus arteriosus.

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