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Chapter 38: Q. 15 (page 1120)

Synchondroses and symphyses are:

  1. synovial joints
  2. cartilaginous joints
  3. fibrous joints
  4. condyloid joints

Short Answer

Expert verified

The correct answer is option (b).

Synchondroses and symphyses are cartilaginous joints.

Step by step solution

01

Cartilaginous joints 

  • Bones are joined by cartilage in joints known as cartilaginous joints.
  • According to their structural characteristics, cartilaginous joints are specific types of joints.
  • Cartilaginous joints permit greater movement between bones than a fibrous joint, but less than the extremely dynamic synovial joint.
02

Step: 1 Explanation for Correct answer

  • Synchondroses and symphyses are the two different categories of cartilaginous joints.
  • A synchondrosis is a cartilaginous joint where hyaline cartilage connects two bones.
  • Symphyses are secondary cartilaginous joints made of fibrocartilage, commonly known as fibrocartilaginous joints. Thus, option b is correct.
03

Step: 2 Explanation for incorrect answer

  • Synovial joints are the smooth cartilage-covered ends of bones. So, option a is wrong.
  • Adjacent bones are securely joined together by fibrous connective tissue to form fibrous joints. So, option c is wrong as well.
  • At the wrist and the bottom of the fingers, condyloid joints can be discovered. It is made up of a condyle, an egg-shaped bone that fits into a cavity with a similar form. Hence, option d is wrong too.

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