Which term refers to a joint where two bones are grown together?

• A. Synchondrosis
• B. Synostosis
• C. Syndesmosis
• D. Synarthrosis

Answer: (A)

The key idea is a cartilaginous joint, where the connection between the two bones is made by cartilage. A synchondrosis is a joint united by hyaline cartilage. This setup is common during growth: the cartilage acts as the growth bridge between bone centers, allowing lengthwise expansion of the bone. As growth finishes, that cartilage can ossify and the two bones may fuse more completely, becoming a synostosis. So, when asked for a term describing a joint where two bones are grown together, the idea of cartilage linking the bones fits synchondrosis. In contrast, synostosis means true bone-to-bone fusion, syndesmosis refers to fibrous tissue connecting the bones, and synarthrosis is a functional category indicating immovable joints, not the specific tissue joining them.