What is one example of a cartilaginous joint?
A.
Hyaline Cartilage joints in the maxilla.
B.
None.
C.
Fibrous Cartilage joints in the Skull.
D.
Hyaline Cartilage joints in the ribs.
The correct answer and Explanation is :
The correct answer is:
D. Hyaline Cartilage joints in the ribs.
Explanation:
Cartilaginous joints are a type of joint where the bones are connected by cartilage. These joints are classified into two main types: synchondroses and symphyses.
- Synchondroses: These joints are connected by hyaline cartilage. An example is the joints between the ribs and the sternum (manubriosternal joint). In these joints, the hyaline cartilage allows for a slight amount of movement and provides flexibility, which is essential for respiration.
- Symphyses: These joints are connected by fibrocartilage. An example is the pubic symphysis, where the pubic bones meet. The fibrocartilage here provides cushioning and allows for some movement, particularly important in childbirth.
Hyaline Cartilage Joints in the Ribs (Option D) specifically refer to synchondroses, where the rib cartilage (costal cartilage) attaches to the sternum. This cartilage is resilient and helps maintain the rib cage’s flexibility while allowing for the expansion and contraction needed for breathing.
Option A mentions “Hyaline Cartilage joints in the maxilla,” but the maxilla (upper jaw) doesn’t have a hyaline cartilage joint; it’s primarily connected by other types of joints, including immovable sutures in adults.
Option C refers to “Fibrous Cartilage joints in the Skull,” which are incorrect for this context as the skull primarily has sutures (fibrous joints) rather than cartilaginous joints.
Option B suggests “None,” which is incorrect because there are clear examples of cartilaginous joints, such as the hyaline cartilage joints in the ribs.
Understanding these types of joints and their functions helps in appreciating how flexibility and stability are maintained in various parts of the body.