Final answer:
A cartilaginous joint is where bones are connected by either hyaline cartilage or fibrocartilage, allowing for very little movement. This includes synchondroses and symphyses, with the former often found in children's growing bones and the latter between vertebrae.
Step-by-step explanation:
The type of structural joint described in the question is known as a cartilaginous joint. These joints are characterized by the connection of bones by either hyaline cartilage or fibrocartilage, and they generally allow for a small degree of movement. There are two types of cartilaginous joints: synchondroses, where the connection is made through hyaline cartilage and typically found in the epiphyseal plates of growing bones in children; and symphyses, where the ends of bones are capped with hyaline cartilage but connected by a pad of fibrocartilage, commonly found between the vertebrae.