List the functions of the skeletal system. (Tip - PMS SB)
Protect internal organs Movement - provides leverage Support Storage of calcium Blood cell production
What tissue forms bone structure?
Specialised connective tissue
What are the two components of the Matrix?
Organic component Inorganic component
What properties does osteoid have? (SEF)
Strong Easily compressed Flexible
What properties does hydroxyapatite have? (HIB)
Hard Inflexible Brittle
What properties does the combination of osteoid and hydroxyapatite give to bone? (SFR)
Strength Flexibility Resistance to shattering
What 2 complexes make up osteoid?
What are the mineral salts that make up most of hydroxyapatite?
Calcium Phosphate Calcium Carbonate
Is osteoid organic or inorganic?
Organic (O for osteoid and organic)
Is hydroxyapatite organic or inorganic?
Cells are suspended in the matrix of bones? True or false?
Name the four cell types suspended in connective tissue matrix?
Osteoblasts Osteocytes Osteoclasts Osteogenic Stem Cells
Which cells produce new bone and secrete osteoid?
What is a mature osteoblast called?
What is the function of an osteocyte?
To maintain the connective tissue matrix in the bone
Where are osteocytes located?
What does Lacunae mean?
What is the function of an osteoclast?
Removes mineral from the matrix Bone remodelling
What is a mature osteogenic stem cell known as?
Where are osteogenic stem cells found?
What are the two types of bone tissue?
Compact (hard, on surface) Cancellous (spongy, interior)
What are the component parts of a haversian system? (BLOC)
Blood vessels Lamallae Osteocytes in lacunae Canaliculi
What is another name for haversian system?
What are the different types of lamellae? (ICC)
Interstitial Circumferential Concentric
What is a Canal of Volkman?
Space through which blood vessels interconnect between the individual osteons.
What is the benefit of osteons aligning in the same direction?
Increases unidirectional strength
What is lamellae?
A sheet like structure present in
What is the name given to the structures in cancellous bone that give rise to the spongy appearance?
Trabeculae (small beams)
What is contained in the spaces between trabeculae?
Red or Yellow bone marrow
What type of tissue is red bone marrow?