Rationale: Blood Supply of Diaphragm

The diaphragm is a dome-shaped muscle that separates the thoracic cavity and the abdominal cavity. It plays a key role in the process of breathing.

When we breathe, the diaphragm contracts and moves downwards, helping to fill the lungs with air. Due to this continuous function, it requires a constant and sufficient blood supply.

The diaphragm receives its main blood supply from the inferior phrenic arteries. These arteries typically originate from the abdominal aorta and supply blood to the lower surface of the diaphragm.

The inferior phrenic arteries provide the diaphragm with oxygen and nutrients, ensuring that the respiratory function continues smoothly.

In exams, options like inferior mesenteric artery or coeliac artery are often given to create confusion. However, these arteries primarily supply blood to the intestines and abdominal organs, not the diaphragm.

Similarly, the function of the suprarenal arteries is to supply blood to the adrenal glands, not the diaphragm.

✅ Exam Point:
The main blood supply to the diaphragm is from the Inferior phrenic arteries. This fact is frequently asked in anatomy and physiology questions.

📌 Disclaimer: This information is for nursing exam preparation and educational purposes only. For actual clinical decisions, please refer to standard anatomy textbooks and guidelines.

💚 Exam Objective Nursing – Asha D
Concept clarity • Exam confidence • Nursing success