Question

Synchondroses and symphyses are:

a) Types of joints
b) Bone marrow components
c) Bone diseases
d) Muscle attachments

Answer 1

Synchondroses and symphyses are types of cartilaginous joints; Synchondroses use hyaline cartilage and are less mobile, while symphyses use fibrocartilage and allow for slightly more movement.

Step-by-step explanation:

Synchondroses and symphyses are types of cartilaginous joints where the bones are connected by cartilage. Specifically, in a synchondrosis, bones are connected by hyaline cartilage, and these types of joints are often found in the epiphyseal plates of children's growing bones. Meanwhile, in a symphysis, the bones are joined by fibrocartilage, which is commonly seen in joints between vertebrae or at the pubic symphysis. The type of cartilage involved in these joints allows for limited movement, with symphyses allowing slightly more movement than synchondroses.

Answer 2

Synchondroses and symphyses are types of cartilaginous joints. Synchondroses are connected by hyaline cartilage and are found in growth areas like the epiphyseal plates, while symphyses are connected by fibrocartilage, found in areas like the intervertebral discs and pubic symphysis. (option a)

Step-by-step explanation:

Synchondroses and symphyses are both types of cartilaginous joints, which are joints where bones are connected by cartilage. Specifically, synchondroses are a type of cartilaginous joint where the bones are joined by hyaline cartilage. These are found in places like the epiphyseal plates of growing long bones in children. On the other hand, symphyses are where the bones are joined by fibrocartilage. This type of joint can be observed at the intervertebral discs between vertebrae and at the pubic symphysis.

These joints can be functionally classified; synchondroses may be considered as a synarthrosis (immobile joint), while symphyses may be classified as an amphiarthrosis (slightly movable joint). Neither joint has a joint cavity, unlike synovial joints, where bones articulate within a fluid-filled space. The specialized structure of cartilaginous joints allows for limited movement and a certain degree of flexibility, which is important for the physical functions these joints support.

Hence, the answer is option a