Flashcards in Bones Ch 6 - Ch 9 Deck (56)
3 skeletal cartilage types
Most abundant, and made of fine collagen fibers.Support, flexibility and resistance.
Located: Articular, Coastal, respiratory and nasal cartilages.
Similar to hyaline but made up of flexible elastic fibers as well. Location: External ear and epiglottis.
Highly compressible, made of chondrocytes alternating with collagen fibers.
Location: intervertebral discs, pubic symphysis and menisci
How does cartilage grow?
Appositional growth:from the out side.
Interstitial growth: from the inside.
4 bone types
Storage of minerals and lipids
Blood cell production
2 most important minerals in bone
calcium and phosphate
Honeycomb of small needle-like or flat pieces in spongy bone
Shaft that forms the long axis of the bone
Bone ends, filled with spongy bone (no medullary space) and covered with compact bone.
Divides the diaphysis and epiphysis and was the site of the growth plate in the youth (epiphyseal plate)
White double layer membrane surrounding the bone, outside made of irregular CT, inside made of osreogenic stem cells
Delicate connective tissue layer that lines the inside of the bone. Contains osteogenic stem cells.
Opening in the bone which the blood supply and nerves pass through
Perforating fibers that anchor the periosteum to the bone and provide anchor points for ligaments and tendons.
Red marrow cavities
Found in spongy bone and is where hematopoiesis takes place--mostly in hip sternum,and heads of femur and humerus.
Projections, depressions and openings that serve as sights for muscle, tendon and ligament attachments.
Bone tissue cells
Mitotic stem cells, located in periosteum and endosteum.
Matrix synthesizing cell responsible for bone growth. Trigger the deposit of calcium salts in the organic matrix.
Osteocytes develop from osteoblasts.
Mature bone cell that monitors and maintains the bone matrix-make up most of the cell population and occupy the lacuna.
Maintain protein and mineral content of the matrix
Involved in repair of damaged bones
Bone reabsorbing cells. Use enzymes to break down bone and release stored minerals (osteolysis)
Large with 50+ nuclei
Derive from the cells that produce monocytes and macrophages, not from osteogenic stem cells
Components of compact bone
Canals & Canaliculi
Tiny weight baring pillars, run parallel to the long across of the bone
Each flat layer of the osteon, wrapped around the center like a tree trunk. Collagen fibers rin diagonally in opposite directions in each layer.
Central canals: Run through the core of each osteon
Perforating (Vilkmann's) canals: Run from periosteum to medullary cavity.
Interstitial lamella: Incomplete lamella between osteons
Circumferential lamella: wrap around ostoens, under periosteum.
Hard matrix between cells