hyaline cartilage, fibrocartilage and elastic

bone cartilage

Connective tissue that contains nerves and blood vessels; made up of collagen and calcium salts; support and movement

found in Pinna/flixible outer ear, epiglottis, auditory tubes to equalize pressure

ELASTIC cartilage, more flexible glossy smooth, with specs small closer together almost evenly spaces or groups of four? LACUNA, fibrous matrix

elastic cartilege ear pic

Elastic cartilage is almost identical to hyaline cartilage but it has an abundant network of fine elastic fibers in addition to collagen type II fibrils. Fresh elastic cartilage has a yellowish color due to the presence of elastin in the elastic fibers, which can be demonstrated by standard elastin stains,

Fibrocartilage is a tissue intermediate between dense connective tissue and hyaline cartilage. found in intervertebral disks, in attachments of certain ligaments to the cartilaginous surface of bones, and symphysis pubis. always associated with dense connective tissue, and the border areas between these two tissues are not clear-cut, showing a gradual transition. Fibrocartilage contains chondrocytes similar to those of hyaline cartilage, either singly or in groups. The chondrocytes *arranged in long rows*. fibers either form irregular bundles between the groups of chondrocytes or are aligned in a parallel arrangement along the columns This orientation depends on the stresses acting on fibrocartilage, since the collagen bundles take up a direction parallel to those stresses. There is no identifiable perichondrium in fibrocartilage.

Fibrocartilage: Note the rows of chondrocytes separated by collagen fibers. Fibrocartilage is frequently found in the insertion of tendons on the epiphyseal hyaline cartilage.

Hyaline cartilage is the most common and best studied of the three forms. Fresh hyaline cartilage is bluish-white and translucent. In the embryo, it serves as a temporary skeleton until it is gradually replaced by bone.

Hyaline cartilage of trachea. H&E stain. Medium magnification. In adult mammals, hyaline cartilage is located in the articular surfaces of the movable joints, in the walls of larger respiratory passages (nose, larynx, trachea, bronchi), in the ventral ends of ribs, where they articulate with the sternum, and in the epiphyseal plate, where it is responsible for the longitudinal growth of bone.

Most common type of cartilage; it is found on the ends of long bones, ribs, and nose

Hyaline cartilage, glossy, smooth with specs, matrix appears transparent....rib cage, trachea rings, growth plates

fibrocartilage

Very tough form of cartilage found in the disks of the spine and at the junctions where tendons attach to bone.

fibrocartilage image

image 2 Very tough form of cartilage found in the disks of the spine and at the junctions where tendons attach to bone. THICK REGULAR BUNDLES, MORE REGULAR, BUNDLES LOOK LIKE THEY ARE ALMOST MOVING IN SAME DIRECTION FOUND IN SYMPHySIS PUBIS, MENISCUS , TMJ AND INTERVERTEBRALA DISCS. HAS LACUNA page 130

elastic cartilage found in Pinna/flixible outer ear, epiglottis, auditory tubes to equalize pressure

lacuna fibrous matrix. Beautiful clusters of lacunae surrounded by MATRIX