Bone Flashcards
Flat bones (classification)
Thin, flattened, and usually a little curved
Examples- cranial, sternum, ribs, and scapula
What is bone matrix?
Surrounds osteocytes in both compact and spongy bone.
1/3 composed of osteoid (ground substance and collagen fibers
2/3 composed of minerals (CaPo4) calcium phosphate combines with calcium hydroxide to yield hydroxyapatite which deposit around. Collagen fibers to give bone its hardness
What lie between lamellae in the lacunae in compact bone
Osteocytes
Appendicular skeleton (region)
80 bones. Bones of the limbs and attachments (girdles)
Other skeletal growth abnormalities
Acromegaly (growth hormone levels rise) thickened bones
Short bones (classification)
Small and boxy.
Example: bones of the wrist (carpals) and ankles (tarsals)
Abnormalities that cause shortened bones
Pituitary growth failure
Achondroplasia (epiphyseal cartilage grown slow)
4 steps of fracture repair
Hematoma formation
Fibrocartilageinous callus formation
Bony callus formation
Remodeling
Abnormalities that cause lengthened bones
Marfan syndrome
GIGANTISM
Functional unit of compact bone
Osteon
Organized by concentric lamellae around a central canal.
Axial Skeleton (region)
126 bones. Bones of the skull, thorax, and vertebral column.
Long bones (classification)
Longer than they are wider. All bones of limbs except carpals and tarsals.
Example femur, humorous
Spongy bone
Formed of struts and beams ka trabeculae
Red bone marrow fills spongy bone for hematopoiesis
Irregular bones (classification)
Very complicated shapes.
Examples- vertebrae, bones of pelvis, facial bones
Long bone growth in length occurs at
Epiphyseal plate
