Osteology Flashcards
(61 cards)
What are the two bone forms
Cortical (compact) and Cancellous (spongy)
Describe a compact bone
Solid mass of hard dense mineralized bone.
Where is compact bone found
Around the periphery of bones. It is the weight bearing portion of the bone
Describe the Cancellous bone
Composed of a mineralalized network of bony plates (trabeculae) that forms a meshwork resembling a sponge
Where are the trabeculae located and what does it contain
Located in center of bone and contains fat and/or blood forming tissues
What are the 5 classifications of bones
- Long bones, short bones, flatbones, sesamoid bones, irregular bones.
Where are long bones located
In the limbs
What are the long bones composed of
Diaphysis, epiphyses, epiphyseal plate, metaphysis
diaphysis
Tubular shaft
epiphysis
Two end regions, distal and proximal, of the bone
Epiphyseal plate
Separates the diaphysis and the epiphyses. This is where growth takes place as the bone increases in length
metaphysis
The part of the diaphysis that lies adjacent to the epiphyseal
Describe short bones
Roughly cuboidal in shape and re composed of Cancellous bone
Where are shorts bones located
Found in the hands and feet
What are flat bones composed of
Ribs, sternum, calvarium of the skull. Composed of inner and outer layer of compact bone separated by cancellous
True or false. Is the Scapula and clavicle flat bones
true
Where are sesamoid bones developed
Within muscle tendons that rub over bony suirfaces
Give an example of a sesamoid bone
patella
Describe irregular bones
Odd shaped bones that do not fall into any of the above groups
What are irregular bones composed of
An outer layer of compact bone and in interior composed of spongy bone
Give an example of irregular bones
Vertebrae, particular bones of the skull and pelvic bones
What are the two classifications of the skeletal system
Axial and appendicular
How many bones are in the adult axial skeleton
80
How many bones in the adult axial bones in the skull
22
