Question:
The 8th and 9th rib costal cartilages form which type of joint with each other?
The 8th and 9th rib costal cartilages form which type of joint with each other?
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What kind of joint links neighbouring lower costal cartilages and allows gliding?
Updated On: Jun 23, 2026
- Costochondral joint
- Interchondral joint
- Synovial joint
- Costovertebral joint
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Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: The costal cartilages of the sixth, seventh, eighth, ninth and tenth ribs are joined to one another along their adjacent borders. The joints formed between these neighbouring costal cartilages are synovial in type.
Step 2: Therefore the articulation between the eighth and ninth costal cartilages is a synovial joint, making option c correct. These interchondral articulations allow some gliding movement that helps in respiration.
Step 3: The distractors describe different articulations. A costochondral joint is between a rib and its own costal cartilage, and a costovertebral joint is between a rib and the vertebral column - neither is between two costal cartilages.
Step 4: Although option b uses the word interchondral, the question asks for the type of joint, and the type of interchondral articulation here is synovial, so option c is the precise answer.
Step 2: Therefore the articulation between the eighth and ninth costal cartilages is a synovial joint, making option c correct. These interchondral articulations allow some gliding movement that helps in respiration.
Step 3: The distractors describe different articulations. A costochondral joint is between a rib and its own costal cartilage, and a costovertebral joint is between a rib and the vertebral column - neither is between two costal cartilages.
Step 4: Although option b uses the word interchondral, the question asks for the type of joint, and the type of interchondral articulation here is synovial, so option c is the precise answer.
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