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25 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Skeletal system |
Involves the complete bone structure of an animal including joints, ligaments, and tendons. |
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Osseo: |
Commonly bone tissue |
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Osteo |
Commonly the entire bone |
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The two divisions of the skeleton: |
1. Axial skeleton- includes skull, vertibrae, ribs 2. Appendicular skeleton- includes all the other bones, i.e. limbs, pelvis |
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The five functions of the skeletal system: |
1. support 2. protection 3. Leverage 4. storage 5. blood cell formation |
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Microscopic components |
Inorganic material- calcium Organic material- collegen, reticulated fibers, elastic tissue |
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Two types of bone: |
Cencellous bones Compact bone |
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Cancellous (spongey) bone |
Spongey doesn't mean soft. Named after its porus appearance. |
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Trabeculae |
Bone formed around the porus holes in cancellous bone. |
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Structures of compact (cortex) bone |
Lamellae (concentric, interstitial, circumferential) Medullary cavity Haversion system Haversion canal Lacuna Canoliculi |
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3 types of lamellae: |
Concentric- rings of compact bone within the bone. Interstitial- compact bone between all the concentric lamellae. Circumferential- 2 locations: A. Inner circumferential (towards the center, wraps around the medullary cavity) B. Outer circumferential (wraps around entire bone) |
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Medullary cavity |
The hole in the center of the bone. |
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Osteon |
One single unit of concentric lamellae. |
Haversion system |
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Haversion canal |
The center of the osteon, allows blood vessels to run through it. |
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Lacuna |
Microscopic pit in the bone, filled with fluid, that houses a bone cell. |
Latin for "little lake" |
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Canoliculi |
Attached to the lacuna, looks like little canals. Usually passages for fluid to pass through. |
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Osteoblast |
Immature bone cell. |
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Osteocyte |
Mature bone cell. |
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Osteoclast |
A cell that breaks down bone when the body needs calcium. |
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Volkmann's canals |
Perpendicular to Haversion canals, these canals are horizontal and allow for blood vessels in the bone. |
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Nutrient foramen |
Hole in the bone that provides a space for the nutrient artery. |
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Nutrient artery |
Main artery that delivers blood into the bone. |
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Periosteum |
Very thin layer that surrounds the entire outside of a bone. |
Bone blanket |
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Perichondrium |
Layer of cartilage that wraps around the bone, underneath the periosteum. Eventually turns into bone to form the periosteum. |
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Sharpey's fibers |
Anchor the periosteum to the outerlying bone (outer circumferential). |
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