Blood supply of femoral head is
**Core Concept**
The blood supply to the femoral head is crucial for its viability and function. The **femoral head** receives its blood supply from three main sources. Understanding these sources is essential for managing conditions like femoral neck fractures.
**Why the Correct Answer is Right**
The correct answer is related to the **retinacular arteries**, **ligamentum teres**, and **femoral neck arteries**. The retinacular arteries, branches of the **medial** and **lateral circumflex femoral arteries**, provide the main blood supply to the femoral head. The ligamentum teres also supplies a small portion of the femoral head, particularly in children.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately represent the primary blood supply to the femoral head.
**Option B:** This option is also incorrect as it is not the sole supplier of blood to the femoral head.
**Option C:** Similarly, this option is incorrect because the blood supply to the femoral head is more complex.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that the blood supply to the femoral head is vulnerable to disruption, especially in femoral neck fractures, which can lead to **avascular necrosis**.
**Correct Answer:** D. Retinacular arteries and to a lesser extent ligamentum teres and femoral neck arteries.