Question

Articulation Characteristics: FILL IN THE BLANKS Intervertebral discs are an example of a cartilage pad are structurally classified as___ and functionally as____. The tooth is bonded to its bony socket is a _ __a type of fibrous joint. It provides movement ____. The pubic symphysis is structurally classified as ____and it provides____ movement. Little to no movement is provided by a syndesmosis joints, classified as _____. Articulating bones are limited in their movement by the presence of a____. In a synovial joint, bones do not directly articulate because of the presence of a____ Hyaline cartilage and the articular cartilage of a synovial joint differ in two respects: 1) Articular cartilage lacks_____ a 2) Hyaline cartilage contains less fluid in its_____. This word was introduced in chapter 3. The articular cartilage marks the completion of the _____membrane. Synovial fluid functions to reduce ____.Joints containing synovial fluid are structurally classified as ______and functionally classified as____ Synovial fluid provides _____for chondrocytes, as reduces ___by absorbing. A(n) _ __structure found in the tibio-femoral joint that is made of cartilage is the____

MOVEMENTS: Movements which decrease the angle between the object and its articulating surface are____ . Increasing the angle is called_____ During____ movement, a bone remains vertical as it turns around its longitudinal axis. Condyloid joints are___ Circumduction is a __motion. ____m otion describes an articulation where both objects have mobility in any direction. Decreasing the angle of a joint is called___ movement in the opposite plane is called____.

Answer 1

Joints are classified based on structural composition of the joint and presence or absence of cavity in th joint into 3 categories:

1. Cartilagenous
2. Fibrous
3. Synovial

Here the intervertebral discs between the vertebrae in the vertebral column are made of fibrocartilage hence they are classified structurally in cartilagenous type of joints.

Functionally the joints are classified into 3 main categories:

1. Synarthroses: In this the joint is immobile and this type is mainly seen in joints connected by fibrous tissue. Example sutuiral lines in the skull.
2. Amphiarthroses: This type of joint has limited mobility and mainly seen between the bony surfaces connected by cartilage or ligaments. Intervertebral discs between vertebrae.
3. Diarthroses: Here there will be synovial capsule and joint space , this type of joint has good mobility. Example is shoulder joint, hip joint.

So intervertebral disc belongs to Amphiarthroses.