Invertebral discs
A spinal disc, also known as an intervertebral disc It is a cartilaginous structure that contains a gel-like liquid and acts as a cushion to keep the vertebrae flexible and from grinding against each other.Between each vertebrae is an intervertebral disk, which is a thick, fibrous disk of cartilage.
They are made of vinyl.
You have outer annulus fibrosus. Which is made of fibrous tissue. Inside the annulus fibrosus, you have jelly like nucleus pulposus.
Discs are made of fibrocartilage.
Its the same man.
Compact discs.
Optical Discs
small discs of cartilage
The intervertebral discs are made of outer annulus fibrosus, which is basically fibrocartilage.
Brake discs are made of very hard steel. Their pads are made of friction materials.
Optical Discs