All of the following joints ossify 16 years of age except
**Core Concept**
The process of ossification in joints is a complex phenomenon that involves the formation of bone tissue from cartilage. In humans, the majority of joints undergo ossification during childhood and adolescence, but some joints continue to develop later in life.
**Why the Correct Answer is Right**
The correct answer is related to the delayed ossification of a specific joint. The joints that ossify at the age of 16 are typically those that involve the epiphyseal plates, which are sites of active bone growth. The growth plates in these joints close later in life, allowing for continued bone growth and development.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not relevant to the delayed ossification of joints. The correct joint that ossifies at the age of 16 is not mentioned here.
**Option B:** This option is incorrect because it is a distractor that does not relate to the delayed ossification of joints. The correct joint is not mentioned in this option.
**Option C:** This option is incorrect because it is a distractor that does not relate to the delayed ossification of joints. The correct joint is not mentioned in this option.
**Option D:** This option is incorrect because it is a distractor that does not relate to the delayed ossification of joints. The correct joint is not mentioned in this option.
**Clinical Pearl / High-Yield Fact**
The joints that ossify at the age of 16 are typically those that involve the epiphyseal plates. The growth plates in these joints close later in life, allowing for continued bone growth and development.
**Correct Answer:** C. The distal ends of the femur, humerus, radius, and ulna ossify by the age of 16.