Extracapsular Ligaments:

ligamentum patella:	from inferior border of patella to tibial tuberosity; is the continuation of quadriceps tendon.
tibial collateral:	broad flat band attached on medial epicondyle of femur (below adductor tubercle) - runs downward and forward to the medial condyle of the tibia - is crossed by the tendons of sartorius, gracilis and semitendinosus - attaches to meniscus.
fibular collateral:	round cord from lateral epicondyle of femur (above groove of popliteus), runs downward and backward to head of fibula - is primarily covered by the tendon of biceps femoris.
oblique popliteal:	extension of semimembranosus - attached above the lateral condyle of femur - forms the floor of popliteal fossa and is in contact with popliteal artery.
arcuate popliteal:	Y-shaped - from the posterior border of the intercondylar area of tibia and the lateral epicondyle of femur to the area below the head of fibula.

Intracapsular Ligament and Other Structures: (Netter: 478).

The cruciate ligaments are called cruciate because they cross each other.

anterior cruciate:	anterior intercondylar area of tibia, runs superiorly, posteriorly and laterally to the posterior part of the medial surface of the lateral femoral condyle.
posterior cruciate:	posterior intercondylar area of tibia, runs superiorly, anteriorly and medially to the lateral surface of the medial condyle of the femur.

Note. The cruciate ligaments:

- are tight both in flexion and extension but are most relaxed at about 30° of flexion, where the collateral ligaments are tight in extension and relaxed in flexion.
- prevent anterior and posterior displacement of tibia where the collateral ligaments prevent abduction/adduction of the knee-joint.

Click to see the drawings below:

Click to see the photographs below: