histo lab 4

Cartilages

are tougher, sifter tissues forming such structures as nose and larynx. It is classified according to the types of fibers in the matrix or ground substance.  

The matrix appears to be clear as it masks the fine fibrils present.

Hyaline cartilage

is the basic cartilage. The cells appear as nests in pairs or multiples of two. 

Bone

is cartilage which has become hardened by mineral salt deposits

Hyaline
Fibrous
Elastic

Osseus

Types of cartilage

Hyaline cartilage

It is the most common type of cartilage, composed of type II collagen and chondromucoprotein.

Structural Characteristics:

●clear bluish appearance

●clear intercellular material

●large spherical cells in clusters  

Allows growth for long bones; provides rigidity with some flexibility in the trachea, bronchi, ribs, and nose

Function of Hyaline cartilage

Growing long bones, cartilage rings of the respiratory system, costal artilage of ribs, nasal cartilages, articulating surface of the bone, and the embryonic skeleton

Location of hyaline cartilage

Elastic cartilage

Its matrix has many elastic fibers in addition to type II collagen.

It is very cellular - note the abundant chondrocytes throughout this tissue.

Structural Characteristics:

●intercellular spaces contain yellow elastic fibers

●hard intercellular substances with collagenous fibers and inorganic salts

●cells round or oval  

Provides rigidity with even more flexibility than hyaline cartilage because elastic fibers return to their original shape after being stretched

Function of elastic cartilage

External ears, epiglottis, and auditory tubes

Location of elastic cartilage

Fibrous cartilage

It is primarily composed of type I collagen.

It has a dense arrangement of cartilage fibers that are arranged in an orderly manner.

Numerous chondrocytes are located within their lacunae and are spaced between the fibers.

Structural Characteristics:

●same structure as hyaline cartilage

●abundant fibers and intercellular spaces 

Type I collagen

Fibrous cartilage is primarily composed of

somewhat flexible capable of withsatanding considerable pressure; connects structures subjected to great pressure

Function of fibrous cartilage

Intervertebral disk, pubic symphysis, and articular disks

Location of fibrous cartilage

Osseus cartilage

Its matrix has many elastic fibers in addition to type II collagen.

It is very cellular - note the abundant chondrocytes throughout this tissue.

Structural Characteristics:

●intercellular spaces contain yellow elastic fibers

●hard intercellular substances with collagenous fibers and inorganic salts

●cells round or oval  

Type II collagen

Osseus cartilage is primarily composed of

provides great strength, and support and protects internal organs

Osseus tissue function