Together, these macromolecules make up 25% of the wet weight of cartilage, with water accounting for most of the remainder.
These elements are homologous to the bones and cartilage of the primary jaw joint in non-mammalian jawed vertebrates.
The endocast has a small dorsal projection that represents an unossified space that in life was probably occupied with cartilage.
The ears have a sunken center and two frontal notches to depict the small central projection of cartilage (the "tragus").
Dorsally, a median excavation probably originated from an unossified zone that was originally filled with cartilage.
Cartilage that resembles articular cartilage covers the central parts of the inferior and superior surfaces of the vertebral bodies.
The end plate is formed from cartilage that resembles articular cartilage and vertebral cortex.
This process culminates in irreversible damage to cartilage, bone and tendon.
