Is wheelbarrow second class lever?
In second class levers the load is between the effort (force) and the fulcrum. A common example is a wheelbarrow where the effort moves a large distance to lift a heavy load, with the axle and wheel as the fulcrum. Nutcrackers are also an example of a second class lever.
Is the knee a Condyloid joint?
It must be regarded as consisting of three articulations in one: two condyloid joints, one between each condyle of the femur and the corresponding meniscus and condyle of the tibia; and a third between the patella and the femur, partly arthrodial, but not completely so, since the articular surfaces are not mutually …
Is the knee a stable joint?
The stability of the knee joint is dependent upon static and dynamic factors. The static stabiliser includes passive structures such as the knee joint capsule and the various ligaments and other associated structures such as the menisci, the coronary ligaments, the menisco-patella and patello-femoral ligaments.
What does the Condyloid joint allow?
Condyloid joints allow movement with two degrees of freedom much like saddle joints. They allow flexion/extension, abduction/adduction and therefore also allow circumduction. Unlike ball and socket joints, condyloid joints do not allow axial rotation.
Is knee joint hinge or Condyloid?
The knee joint is a hinge type synovial joint, which mainly allows for flexion and extension (and a small degree of medial and lateral rotation). It is formed by articulations between the patella, femur and tibia.
What is the side of your knee called?
The collateral ligaments of the knee are located on the outside part of your knee joint. They help connect the bones of your upper and lower leg, around your knee joint. The lateral collateral ligament (LCL) runs on the outer side of your knee. The medial collateral ligament (MCL) runs along the inside of your knee.
Why is knee a modified hinge joint?
During flexion and extension motions, the condyles of the femur both roll and glide over the surfaces of the tibia. This slight rotation of the knee is why it is referred to as a modified hinge, as opposed to a true hinge which is only capable of flexion and extension.
What does a Condyloid joint look like?
Condyloid joints consist of an oval-shaped end of one bone fitting into a similarly oval-shaped hollow of another bone (Figure 5). This is also sometimes called an ellipsoidal joint.