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Skeletal System (Skeletal System/Tissues (Components of Long Bone…
Skeletal System
Skeletal System/Tissues
Functions:
Support, framework for soft tissue connection
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Protection; cranium protects brain, vertebrae the spine and rib cage the lungs, heart and thoracic cavity organs
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Structural Components
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65% is inorganic, made up of calcium and phosphorous
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Fibrocartilage included in intervertebral discs, pubic symphysis and meniscus of knee.
Compact Bone
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Made up of periosteum, dense irregular connective tissue, and is osteogenic.
Spongy Bone
Fills space between compact bone, found at the ends of long bone and in flat bone.
Contains trabeculae, little bits of bone connected to each other.
Endosteum; osteogenic.
Locations of red bone marrow.
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Red Bone Marrow
Gelatinous, soft tissue. All bones are filled with red bone marrow
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Types of Bone Cells
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Osteoclast; the fusion of several leukocytes: Multinucleate
Very Large
microvilli
mobile
secrete enzymes that break down bone
Cells and extracellular Matrix: organic: broken down inside osteoclast.
inorganic: minerals absorbed into the blood stream.
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Joints
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Cartilaginous Joints
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Symphysis; pubic symphysis and intervertebral joints; made up of hyaline cartilage and fibrocartilage.
slightly movable
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