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Exam 2 Chapter 7 Obj
Vocabulary Words/Skeletal System
| Question | Answer |
|---|---|
| Long Bones | Have long longitudinal axes and expanded ends. Ex: Forearm,thigh |
| Short Bones | Are cubelike, with roughly equal lengths and widths. Ex: Wrists,ankles |
| Flat Bones | Are platelike structures with broad surfaces. Ex: Ribs,scapulae,and some bones of the skull |
| Irregular Bones | Have a variety of shapes and are usually connected to several other bones. Ex: Vertebrae that comprise the backbone and many facial bones |
| Sesamoid (Round) Bones | Are usually small and nodular and are embedded in tendons adjacent to joints. Ex: Kneecap (Patella) |
| Epiphysis | The end of a bone wich aritculates (or forms a joint) with another bone. |
| Articular Cartilage | A layer of hyaline cartilage which the articulating portion of the epiphysis is coated with. |
| Diaphysis | The shaft of the bone. |
| Periosteum | A tough, vascular covering of fibrous tissue that encloses the bone. |
| Compact Bone (Cortical Bone) | Has a continuous extracellular matrix with no gaps. |
| Spongy Bone (Cancellous Bone) | Bone that consists of bars and plates separated by irregular spaces. |
| Trabeculae | Branching bony plate that separates irregular spaces within spongy bone. |
| Marrow | A specialized type of connective tissue. |
| Osteon | Cylinder-shaped unit containing bone cells that surround a central canal. |
| Osteocyte | Mature bone cell |
| Intramembranous Bone | The broad, flat bones of the skull./Bone that forms from membranelike layers of primitive connective tissue. |
| Osteoblasts | Bone-forming cell. |
| Endochondral Bones | Bone that begins as hyaline cartilage that is subsequently replaced by bone tissue. |
| Epiphyseal Plate | Cartilaginous layer in the long bone epiphysis that grows. |
| Osteoclast | Cell that erodes bone. They do this by secreting an acid that dissolves the inorganic component of the organic components. |
| Bone Remodeling | Occurs throughout life as osteoclasts resorb bone tissue, and osteoblasts replace the bone. (Part of Homeostasis of Bone Tissue) |
| Growth Hormone | Stimulates division of cartilage cells in the epiphyseal plates. |
| Hematopoiesis | The process of blood cell formation. |