Term
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Definition
| Osseous Connective Tissue in which the matrix is hardened by calcium phosphate by calcification. |
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Term
| Examples of Appendicular Skeleton |
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Definition
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Term
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Definition
| Osseous tissue, blood, bone marrow, cartilage, adipose tissue, nervous tissue, and fibrous connective tissue |
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Term
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Definition
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Term
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Definition
| Expanded head at each end of the bone. |
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Term
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Definition
| A transitional zone facing the marrow cavity where cartilage is being replaced by bone. |
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Term
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Definition
| Concentric lamellae, central canal, osteon |
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Term
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Definition
| lattice of delicate slivers of bone called spicules (rods) and trabeculae (thin plates). Spongelike appearance. |
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Term
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Definition
| Spongy bone tissue containing fluid filled spaces |
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Term
| What is the medullary cavity? |
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Definition
| The bone marrow cavity - contains bone marrow. |
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Term
| What is nutrient foramen? |
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Definition
| Small holes where blood vessels penetrate into the bone. |
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Term
| What is articular cartilage? |
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Definition
| The joint surface where one bone meets another is covered with a layer of hyalin cartilage called articular cartilage. |
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Term
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Definition
| A sheath covering the bone. |
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Term
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Definition
| Lining the internal surface of a bone, a thin layer of reticular connective tissue with cells that dissolve osseus tissue and others that deposit it. |
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Term
| What is epiphyseal plate? |
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Definition
| In children and adolescents an epiphyseal plate of hyaline cartilage searates the marrow spaces of the epiphysis and diaphysis. On x-rays it appears as a transparent line. |
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Term
| What are perforating (sharpy) fibers? |
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Definition
| Collagen fibers that penetrate into the bone matrix. |
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Term
| How many types of bone cells are there? |
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Definition
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Term
| What are the names of the bone cells? |
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Definition
Osteogenic
Osteoblasts
Osteocytes
Osteoclasts |
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Term
| What are osteogenic cells? |
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Definition
Location: endosteum, inner layer of periosteum, central canals. Function: Provide the source of new bone cells, DIVIDE to form osteoblasts. |
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Term
| What are Osteoblast cells? |
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Definition
| Location: Inner layer of edosteum and periosteum. Functions: Synthesize collagen, mineralize bone, form lacunae, do NOT divide. |
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Term
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Definition
| Former Osteoblasts cells, Remain connected to other osteocytes by GAP JUNCTIONS, through gap junctions they pass along the need for more bone material to the surface osteoblasts, osteoblasts then can make more bone tissue. |
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Term
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Definition
| Functions: move minerals from bone into blood, dissolve matrix using acids and enzymes. STRUCTURE: Large cells arising from white blood cells, monocytes (wbcs) fuse to form osteoclasts |
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Term
| What are Howship's lacunae |
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Definition
| Depressions etched into bone surface by osteoclasts. |
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Term
| What is bone matrix made of? |
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Definition
Flexible organic portion: collagen, GAG's, Proteoglycans and glycoproteins
Hard inorganic portion: Hydroxyapatite (calcium phosphate, calcium carbonate)
Magnesium, calcium, sodium |
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Term
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Definition
In children: found in most bones
In adults: In axial skeleton, in proximal heads of femur and humerus, hemopoietic (makes blood cells). |
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Term
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Definition
| Adults - in shafts of long bones, arises from red marrow of child's bone, contains fat, no longer hemopoietic but can revert. |
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Term
| What are the 5 zones of metaphysis |
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Definition
| Zone of reserve cartilage, zone of cell proliferation, zone of hypertrophy, zone of calcification, zone of bone deposition |
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