## **Core Concept**
A sequestrated lung, also known as pulmonary sequestration, is a rare congenital anomaly where a portion of lung tissue receives its blood supply from an anomalous systemic artery rather than the pulmonary arteries. This condition can lead to various clinical manifestations, including respiratory distress and recurrent infections.

## **Why the Correct Answer is Right**
The correct answer, **systemic arteries**, is right because pulmonary sequestrations are characterized by their systemic arterial blood supply. This anomalous blood supply typically originates from the aorta or one of its branches, bypassing the normal pulmonary circulation. The systemic arterial supply is essential for the development and maintenance of the sequestrated lung tissue.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because pulmonary arteries do not typically supply sequestrated lung tissue; instead, they supply normal lung tissue.
- **Option B:** This option is incorrect because, although bronchial arteries are part of the systemic circulation and can supply lung tissue, sequestrations are specifically known to be supplied by anomalous systemic arteries directly from the aorta or its major branches, not typically from bronchial arteries.
- **Option C:** This option is incorrect for the same reasons as Option A; pulmonary veins are involved in the venous drainage of lung tissue, not the arterial supply.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that pulmonary sequestrations can be classified into two types: intralobar and extralobar. **Intralobar sequestrations** usually present in adulthood with symptoms like cough, hemoptysis, and recurrent infections, and they typically drain into the pulmonary veins. **Extralobar sequestrations** are often diagnosed in infancy or childhood, presenting with symptoms like respiratory distress, and they usually drain into the systemic veins. Both types are supplied by systemic arteries.

## **Correct Answer:** . systemic arteries