Cartilage and bone Flashcards
The large ratio of GAGs: Type 2 collagen in cartilage serves what purpose?
It allows diffusion between chondrocytes and blood vessels
Chrondrocytes lie in ……
Lacunae
What are the three types of cartilage?
Hyaline, elastic and fibrocartilage
What is the function of chondrocytes?
They produce and maintain the extensive extracellular matrix
Cartilage is surrounded by …….
Perichondrium
Hyaline cartilage contains which type of collagen?
Type 2
Give a location where hyaline cartilage may be found. (4)
- Respiratory passageways
- The ends of long bones
- The anterior ends of the ribs
- Foetal skeleton
Hyaline cartilage ……… with age
Calcifies
Elastic cartilage contains which types of fibres?
Type 2 collagen and elastic fibres
Name the three locations elastic cartilage is found (3)
- Auditory tubes
- External ear
- Epiglottis
Is the perichondrium present in elastic cartilage?
Yes
What types of fibres does fibrocartilage contain?
It contains type 2 and type 1 collagen in thick bundles
What are the four locations where you would find fibrocartilage?
- Intervertebral discs
- Menisci
- Pubic symphysis
- Portions of tendons
Fibrocartilage has a perichondrium. True or false?
False.
What cell types are present in fibrocartilage?
Fibroblasts and chondrocytes
Which bone type forms a network of fine bony columns of plates to combine strength with lightness?
Cancellous or spongy bone
Compact bone is found where?
On the external surfaces of bone
Bone is a vascular tissue. True or false?
True
Which type of bone contains Haversian canals and Volkmann’s canals?
Compact bone
Which type of canal lies within the centre of an osteon?
Haversian canal
What are canaliculi?
They are tiny interconnecting tunnels that link osteocytes and osteons
Osteocytes lie in ……..
Lacunae
What fills the gaps between the trabeculae in spongy bone?
Bone marrow
How do osteoclasts break down bone?
Using H+ ions and lysosomal enzymes
