Midterms | Skeletal System Flashcards
Functions of the skeletal system
- Support structural framework
- Protecs internal organs
- Assistance in movement
- Mineral homeostasis
- Blood cell production
- Triglyceride storage
Tendons vs ligaments
Tendons: muscle-bones
Ligaments: bone-bone
Storage and release of minerals
Mineral homeostasis
Term refering to old patients
Geriatric
Bone tissue makes up how many percent of the total body weight?
18%
Location of blood cell production
Red bone marrow (RBC, WBC, Platelet)
Process of making blood
Homopoiesis
Where is triglyceride storage produced?
Yellow bone mmarrow
Yellow bone marrow consists of (1) for (2)
- adipose cells
- chemical energy reserve
Bone marrow difference for infants and adults
Infant: Red bone marrow
Adult/ increasing age: yellow bone marrow
Parts of a typical long bone
- Diaphysis
- Epiphysis
- MEtaphysis
Bone’s shaft/ body
Diaphysis
Long/ main portion of the bone
Diaphysis
Proximal and distal end of the bone
Epiphysis
Region between diaphysis and epiphysis
Metaphysis
Layer of hyaline cartilage that allows the bone to grow in length
Epiphyseal growth plate
Epiphyseal growth plate refers to the layer of — that allows the bone to grow in length
hyaline cartilage
At ages (1), the epiphyseal plate is replaced by bone resulting to the formation of (2)
- 14-24
- epiphyseal line
Physis/ Growth Plate vs Epiphyseal Line
Physis/ Growth Plate: Occurs on newborn/ infants
Epiphyseal Line: Growth Plate closes (14-24 yrs)
Surronds the bone surface that are not covered by articular cartilage
Periosteum
Where is the periosteum connected?
Sharpey’s fiber
Other term for sharpey’s fiber
Perforating fibers
Collagen that extends from the periosteum and to the bone’s extracellular matrix
sharpey’s fiber
Sharpey’s fiber is a (1) that extends from the (2) and to the bone’s (3)
- collagen
- periosteum
- extracellular matrix
Other term for medullary cavity
marrow cavity
Hollow cylindrical space within the diaphysis that contains yellow bone marrow
Medullary cavity
Medullary cavity minimizes (1) and maximizes (2)
- weight
- strength
Types of cells in the bone
- Osteoprogenitor/ Osteogenic cells
- Osteoblasts
- Osteocytes
- Osteoclasts
Contains single layer of bone-forming cells
Endosteum
Thin membrane tha tlines the medullary cavity
Endosteum
Unspecialized bones stem cells derived from mesenchyme
Osteoprogenitor/ Osteogenic cells
Where do Osteoprogenitor/ Osteogenic cells come from?
Mesenchyme
Where connective tissues are formed
Mesenchyme
The only bone that undergo cell division
Osteoprogenitor/ Osteogenic cells
Where are osteoprogenitor/ osteogenic cells found?
Inner portion os the periosteum, endosteum, and canals within the bone with blood vessels
Bone building cells
Osteoblasts
Synthesize ans secrete collagen to build the extracellular matrix
Osteoblasts
Initiates calcification
Osteoblasts
Hardening of calcium/ any minerals
Calcification
Osteoblasts become osteocytes when —
trapped
Mature bone cells
Osteocytes
Maintains the metabolism in the bone such as the exchange of nutrients and wastes in the blood
Osteocytes
Osteocytes maintains the metabolism in the bone such as the exchange of (1) and (2) in the blood
- nutrients
- wastes
Derived from the fusion of as many as 50 monocytes (WBC)
Osteoclasts
Where are osteoclasts derived?
fusion of as many as 50 monocytes (WBC)
Releases powerful lysomal enzymes and acids that digests protein and mineral components
Osteoclasts
Where are osteoclasts concentrated?
Endosteum
Osteoblasts vs Osteoclasts
Osteoblasts BUILD bones; Osteoclasts CARVE OUT bones