Skeletal System
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Name 5 characteristics of the axial skeleton:
80 bones, flat irregular bones, synarthrotic joints (most), protection, mostly red marrow
Name the 6 functions of the skeletal system:
Support, movement, protection, mineral supply, hemopoiesis, storage
Name 5 characteristics of the appendicular skeleton:
126 bones, long, short bones, diarthrotic joints (most), movement, mostly yellow marrow
Name 9 facts about cartilage:
• Flexible • More matrix • Collagenous matrix • No canal system • No blood vessels • Chondocytes • Periochondrium • 3 types • No marrow
Name 9 facts about bone:
• Rigid • More cells • Calcified matrix • Canal system • Blood vessels • Osteocytes • Periosteum • 2 types • Marrow
What is the epiphysis? Epiphyseal line?
Epiphysis- end of a long bone, capped with articulate cartilage Epiphyseal line- separates the epiphysis from the shaft
What is the diaphysis?
The shaft of a large bone, compact bone w a central cavity
What is the articular cartilage?
Only remaining evidence of a bone’s cartilaginous past, smooth, slippery, bloodless COVERS THE EPIPHYSIS
Periosteum?
Fibrous, cellular, vascular, highly sensitive, life support sheath for bone COVERS THE SHAFT
Cancellous (spongy) bone/ red marrow?
Tiny beams of bone forming lattice truss capable of reorientation INSIDE OF EPIPHYSISES AND LINES SHAFT
Compact bone?
Dense solid of diaphysis, solid bone tissue FREE SPACE INSIDE BONE
Medullary cavity, yellow marrow?
Serves to lighten bone weight and provide space for marrow, INSIDE CANCELLOUS BONE IN SHAFT
Nutrient artery?
Oblique tunnel, branches throughout shaft, supplies w nutrients INSIDE YELLOW MARROW OF SHAFT