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Microanatomy
Bone Development and Joints
11
Medical
Professional
09/17/2008

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Cards

Term
Basics of Bone Formation
Definition
1. mesenchymal cells differeniate to osteoblasts
2. osteoblasts secret osteoid
3. osteoid mieralizes, trapping osteoblasts
4. osteoblasts become osteocytes
5. small fragments fuse to for large pieces
Term
Intramembranous ossification
Definition
occurs in fields of mesenchyme without precursos cartilage model
-skull and facial bones
Term
Endochondral ossification
Definition
mesenchym-->cartilage model-->bone
Term
Diplor-two plates
Definition
flat bones of skull that form by intramembranous ossification
sandwich spongy bone
Term
Epiphyseal plate
Definition
hyaline cartilagenous plate where growth of long bones in children occurs
Term
Types of Joints
Definition
1. fibrous joints--fixed
2. cartilaginous joint--limited mobility
3. synovial joint--full mobility
Term
Fibrous joint
Definition
-skull sutures
Term
cartilaginous joint
Definition
intervertebral discs, symphsis pubis
joined by fibrocartilage
Term
synovial joint
Definition
shoulder, elbow, wrist, knee
encapsulated by ligamentous structures
Term
Characteristics of synovial joint
Definition
1. hyaline cartilage
2. synovial membrane in capsule
3. synovial fluid lubricant
4. very slippery
5. wearing down causes osteoarthritis
Term
Meniscus
Definition
-cresent shaped pads in synovial joints
-restrict mobility to prevent tears
-consist of fibrocartilage pads
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