Bone, Cartilage and Joints Flashcards
What is bone comprised of?
Is rigid and comprised of collagen fibres that are impregnated by a crystal-line calcium salt
What are the 2 types of bone?
Compact - cortical bone
Spongy - cancellous bone
What is the cavity in the middle of bone called?
Marrow (medullary) cavity
What are the different types of bone?
Long, short, flat, pneumatic, sesamoid or irregular
What is the function of sesamoid bone?
Protect tendons from excessive wear
Sesamoid bone - patella
What are the different parts of a long bone?
Proximal epiphysis, metaphysis, diaphysis, distal epiphysis, epiphyseal line, articular cartilage
What is the epiphysis?
Rounded end of the long bone, at its joint with adjacent bones
What is the shaft of the long bone called?
Diaphysis
What is the metaphysis?
Wide portion of the long bone.
The metaphysis develops during childhood period - ossification centres being close to ends of bone
Contains highly metabolic et of tissues, including trabecular bone, blood vessels and marrow adipose tissue
What is the difference between condyle and epicondyle?
Condyle are usually more round shaped, smooth and large, articulates with a bone
Epicondyle is rough and small, provides surface for muscle and ligament attachment
What is the function of a condyle?
Articulates with bone
What us compact bone surrounded by?
Periosteum on outside and inside by an endosteum
What is compact bone composed of?
Haversian system
What osteogenic (bone producing) cells are found in the periosteum?
Osteoblasts
Where in the long bone is the compact bone mainly found?
Diaphysis
Where in the long bone is spongy bone mainly found?
Epiphysis
What type of bone is found in the marrow cavity?
Bone marrow
Which type of growth causes an increase in width?
Appositional growth
What type of growth causes an increase in length?
Interstitial growth
Describe meaning of appositional growth
Means to add new bone tissue from the outside and increases width of existing bone