The following is true of the lateral meniscus*Is in the shape of a semi-circleIt is composed of mainly hyaline cartilageIt is less adherent/attached to the surrounding structures and therefore more mobileIt is supplied by the middle genicular artery

The statement about the lateral meniscus is mostly correct with a few clarifications:

1. Shape: Yes, the lateral meniscus is indeed semi-circular in shape. It is broader in the middle and narrower at the edges.

2. Composition: The lateral meniscus is composed of fibrocartilage, not hyaline cartilage. Fibrocartilage is tougher and more resilient than hyaline cartilage, making it better suited to withstand the weight-bearing and shock-absorbing roles of the meniscus.

3. Adherence/Mobility: Yes, the lateral meniscus is less adherent to the surrounding structures compared to the medial meniscus, making it more mobile. This is because it is not attached to the lateral collateral ligament, unlike the medial meniscus which is attached to the medial collateral ligament.

4. Blood Supply: The blood supply to the menisci, including the lateral meniscus, is primarily from the genicular arteries, a group of arteries around the knee. However, it's important to note that the majority of the meniscus (about 2/3) is avascular, meaning it does not have a direct blood supply. The peripheral 1/3 part of the meniscus is vascularized and can heal more effectively if injured.