Chap 5: Bone (bone structure) (exam 2) Flashcards
What are the two types of bone
Primary and secondary
What type of bone in primary bone
immature bone (woven)
where is primary bone found
fetal development and bone repair
primary bone is composed of what?
many osteocytes, low minerals and more random collagen I
Secondary bone is is what type of bone
mature bone (lamellar)
There are more minerals in secondary bone meaning what
this bone is stronger than primary bone
organized or random collagen I in mature bone
organized
what are the general structural components of mature bone
Compact bone, cancellous bone, periosteum, endosteum,
Compact bone is made up of what?
lamellae with no CT spaces/vascular channels
what lamellae compose compact bone
outer and inner circumferential lamellae, aversion systems and interstitial lamellae
the outer circumferential lamellae (periosteal lamellae) has newer bone under what?
periosteum has many sharpey’s fibers
the inner circumferential lamellae (endosteal lamellae) is comosed of what
newer bone next to the cancellous bone and marrow cavity
the haversian systems (osteons) have what components
osteocytes in lacunae, canaliculi (thin channels), central (haversian) canal, volkmann’s canals (vascular channel
the Haversian canal contains what?
loose areolar CT, many cell types, blood and lymph vessels, sympathetic nerves, endosteum
Cancellous bone is also known as what
trabecular bone (spongy)
Cancellous bone contains what
Trabeculae, osteon structure, cell nourishment
The trabeculae will align with what?
stress (not randome)
The trabeculae of spongy bone is surrounded by what? i
irregular ct filled spaces
What are the two parts of the periosteum
fibrous and osteogenic periosteum
What is the structure of the fibrous periosteum
lots of collagen I, has a lot of sharpies fibers, many fibroblasts and blood vessels and nerves
The fibrous layer of the periosteum is the closest that what will get to bony matrix?
sensory supply
what is the function of the fibrous periosteum
distribute blood vessels and nerves and provide transition between bone and tendons and ligaments
the osteogenic periosteum’s structure is what?
a single layer of cells
what are the possible cell types in the osteogenic periosteum
osteogenic cells, osteoblasts, osteoclasts
what is the function of the osteogenic periosteum
healing, growth and remodeling
the endosteum is a single layer of cells that line what surface of the bone?
the internal surface
what are the components of endosteum
osteogenic, osteoblast, osteoclasts, and bone lining cells
Endosteum is found lining where?
endosteal lamellae or cancellous bone, ct sinusoids, volkmann;s and central canals
