The blood supply of anterior cruciate ligament (ACL) is primarily derived from
**Core Concept**
The anterior cruciate ligament (ACL) is a critical stabilizer of the knee joint, and its blood supply plays a crucial role in its healing and maintenance. The ACL's blood supply is primarily derived from the surrounding synovial vessels and the genicular arteries.
**Why the Correct Answer is Right**
The ACL's blood supply is mainly derived from the synovial vessels that are embedded within the ligament itself. These vessels are responsible for supplying oxygen and nutrients to the ligament, facilitating its growth and repair. Additionally, the genicular arteries, which are branches of the femoral and popliteal arteries, also contribute to the ACL's blood supply. The synovial vessels are richly networked within the ligament, allowing for efficient exchange of nutrients and waste products.
**Why Each Wrong Option is Incorrect**
**Option A:** The middle genicular artery primarily supplies the posterior cruciate ligament (PCL), not the ACL.
**Option B:** The lateral and medial circumflex femoral arteries primarily supply the femur and surrounding soft tissues, not the ACL.
**Option C:** The tibial and peroneal arteries primarily supply the tibia and surrounding soft tissues, not the ACL.
**Clinical Pearl / High-Yield Fact**
The ACL's blood supply is critical for its healing and repair, particularly after injury. The synovial vessels and genicular arteries provide a rich network of blood vessels that facilitate the exchange of nutrients and waste products, making the ACL more susceptible to injury and less likely to heal properly.
**Correct Answer:** D. Synovial vessels and genicular arteries.