When drawing human figures from live memory or imagination, many art students have certain difficulties in depicting the knee joint. The anatomy of the knee consists of bones, muscles, nerves, cartilages, tendons and ligaments. Let us examine the knee anatomy. In the back of the thigh, the hamstring muscles flex the knee.

Some students oversimplify this part of the leg and this results in rather amature artwork.
All these parts combine and work together.

To help you to avoid such junior mistakes, I created this video lesson. The large muscles of the thigh move the knee. Knee Anatomy drawing tutorial - hướng dẫn vẽ cấu trúc đầu gối chân bên trái lớp vẽ thầy quỳnh, luyện thi vẽ vào đại học kiến trúc, mỹ thuật, khối v - h The knee is a complex joint that flexes, extends, and twists slightly from side to side. Damage in even one part can hinder the functioning of the knee. WebMD's Knee Anatomy Page provides a detailed image and definition of the knee and its parts including ligaments, bones, and muscles. In the front of the thigh the quadriceps muscles extend the knee joint.
The knee also rotates slightly under guidance of specific muscles of the thigh.