Cartilage Flashcards
(27 cards)
What are the three types of cartilage ?
- Hyaline
- Fibrocartilage
- Elastic
What are the three layers of the embryo ?
Endoderm
Mesoderm **
Ectoderm
What cells produce cartilage ?
Chondroblast
What does cartilage allow the tissue to do?
- withstand mechanical stress without permanent distortion
- shock absorber ; sliding area for joints on articulating surface of bone (FACILITIES BONE MOVEMENT )
- some bone forms from a previous cartilaginous pattern
Why is it hard for cartilage to repair itself ?
As it is avascular
What is a mature chondroblast called ?
Chondrocyte
What is a chondrocyte responsible for ?
Maintenance of the tissue
What appearance do chondroblasts have ?
Flattened cells with flattened nuclei
Where do chondrocytes live?
Within the Lacuna
What is the lacuna ?
A space within the matrix
Where do you find hyaline cartilage ?
- articular surfaces of bones
- trachea and bronchus
- costal cartilages
- nasal cavity and nose
Where do you find elastic cartilage ?
- pinna of external ear
- epiglottis
Where do you find fibrocartilage ?
- tendon insertions
- pubic symphysis
- intervertebral discs
- articulate meniscus
What does hyaline cartilage provide ?
A lubricated surface for movable joints and acts as a shock absorber
What type of collagen is hyaline cartilage composed of ?
Type II
What is the surface of hyaline cartilage covered by?
Perichondrium
What are clusters of chondrocytes referred to as?
Isogenous group
Where is the surface of hyaline cartilage not covered by perichondrium ?
Articulate surface of joints
How do cells o f hyaline cartilages get their nutrients ?
From the perichondrium
What is the main difference between elastic and hyaline cartilage ?
The presence of elastic abundance fibres
What is the most important functions of elastic cartilage ?
It can regain its shape after being distorted
What surround the elastic cartilage ?
Perichondrium
What is the collagen responsible in elastic cartilage ?
Type II collagen
How can fibrocartilage be described ?
As an intermediate between dense irregular CT and hyaline cartilage
