Skeletal System Bone tissue

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1
an organ made up of several different tissues working together
Bone
2
the entire framework of bones and their cartilages constitute of
Skeletal system
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the study of bone structure and the treatment of bone disorders is referred as
osteology
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osteo means
bone
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logy means
study of
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give 5 functions of skeletal system
support, protection, assistance in movement, storage of minerals, blood cell production or SPASB
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a bone that one has greater length than width
long bone
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(growing between) bone's shaft or body. Long,cylindrical and main portion of the bone.
Diaphysis
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(growing over) the proximal and distal ends of the bone.
Epiphyses- plural Epiphysis- singular
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(between) regions between the diaphysis and epiphyses
Metaphyses
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(growth plate) a layer of hyaline cartilage that allows the diaphysis of the bone to grow in legth
epiphyseal
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thin layer of hyaline cartilage covering the part of the epiphysis
Articular Cartilage
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Tough connective tissue sheath and its associated blood supply
Periosteum
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Peri- means
around
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marrow cavity, hollow, cylindeical space within the diaphysis that contains fatty yellow bone marrow
Medullary Cavity
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Medulla means
marrow, pith
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a thin membrane that lines the medullary cavity.
Endosteum
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Endo means
within
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what is the extracellular matrix?
it is about 15% water, 30% collagen fibers, 55% crystallized mineral salts.
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what is the most abundant mineral salt?
calcium phosphate
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it combines with another mineral salt, calcium hydroxide to form crystals of?
hydroxyapatite
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mineral crystallizes and the tissue hardens
calcification
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bone building cells
osteoblasts
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depends on the crystallized inorganic mineral salts
Bone's hardness
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depends on its collagen fibers
Bone's Flexibility
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Bone cells are called?
osteoclasts
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4 types of cells present in bone tissue
ostoeprogenitor>osteoblast>osteocytes>osteoclasts
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unspecialized bone stem cells derived from mesenchyme
Osteoprogenitor cells
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synthesize and secrete collagen fibers and other organic components (bone building cells)e
osteoblasts
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(mature bone cells) main cells in bone tissue and maintain ita daily metabolism
osteocytes
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huge cells derived from the fusion of as many as 50 monocytes
osteoclasts
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breakdown of bone extracellular matrix. normal development, maintenance and repair of bone.
Bone Resorption
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Bone is not completely solid but has many small spaces between its cells and extracellular matrix components
True
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some spaces serve as channels for blood vessels that supply bone cells with nutrients. other spaces act as storage areas for red bone marrow.
True
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80% of skeleton is?
compact bone
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20% of skeleton is?
spongy bone
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Strongest form of bone tissue. Provides protection and support and resists the stresses.
Compact bone tissue
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Repeating structural units called osteons or?
Haversian systems
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circular plates
Concentric lamellae
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(small channel) filled with extracellular fluid
Canaliculi
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Between the concentric lamellae are small spaces called?
  • Lacunae
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Trabecular or cancellous bone tissue. Does not contains osteons.Always located in the interior of a bone protected by a covering of compact bone
Spongy Bone tissue
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Filled with red bone marrow and yellow bone marrow
Macroscopic spaces
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Spongy bone is light, which reduces the overall weight of a bone
  • True
  • False
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Passes through a hole in compact bone called the nutrient foramen
Nutrient artery
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Enter the metaphyses of a long bone
Metaphyseal arteries
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Enter the epiphyses of a long bone
Epiphyseal arteries
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On going replacement of old bone tissue by new bone tissue
Bone remodeling
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The removal of minerals and collagen fibers from bone bt osteoclasts
Bone resorption
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The addition of minerals and collagen fibers to bone by osteoblasts
Bone deposition
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