ends during
starts during
death
connective tissue
perichondrium
2011-08-23T08:52:43Z
A layer of dense irregular connective tissue that surrounds the cartilage of developing bone, consisting of two separate layers: an outer fibrous layer and inner chondrogenic layer. The fibrous layer contains fibroblasts, which produce collagenous fibers. The chondrogenic layer remains undifferentiated and can form chondroblasts or chondrocytes. Perichondrium is a type of connective tissue, and also functions in the growth and repair of cartilage. Once vascularized, the perichondrium becomes the periosteum.
UBERON:0002222
XAO:0004049
xenbase3
xenopus_anatomy
NF stage 33 and 34