What is the name of fibrous covering cartilage?

The fibrous covering of cartilage is called the perichondrium. It is a dense layer of connective tissue that surrounds and protects cartilage. The perichondrium is composed of two layers: an inner layer of chondroblasts, which are cells that can differentiate into chondrocytes, and an outer layer of fibrous connective tissue. The perichondrium provides the cartilage with nutrients and oxygen, and it also helps to anchor the cartilage to surrounding tissues.