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ANAT & PHYS II: BONE
SKELETAL
| Question | Answer |
|---|---|
| Classification of Bones by Region: bones of the skull, vertebral column, and rib cage. | Axial skeleton |
| bones of the upper and lower limbs, shoulder, and hip. | Appendicular skeleton |
| Contains no blood vessels or nervesSurrounded by the perichondrium (dense irregular connective tissue) that resists outward expansion | Skeletal Cartilages |
| Provides support, flexibility, and resilienceIs the most abundant skeletal cartilage | Hyaline Cartilage |
| Found in the external ear and the epiglottis | Elastic Cartilage |
| Highly compressed with great tensile strengthContains collagen fibers.Found in menisci of the knee and in intervertebral discs | Fibrocartilage |
| Thin layer of hyaline cartilage. Reduces friction at joints | Articular cartilage |
| Lines internal surfaces of bone. Surrounds medullary cavity | Endosteum |
| Dense irregular connective tissue | Periosteum |
| unspecialized stem cells | Osteogenic cells |
| synthesize & secrete collagen | Osteoblasts |
| mature bone cells | Osteocytes |
| digest bone matrix | Osteoclasts |
| weight-bearing, column-like matrix tubes composed mainly of collagen | Lamella |
| connecting blood and nerve supply of the periosteum to that of the Haversian canal | Perforating or Volkmanns canals |
| small cavities containing osteocytes | Lacunae |
| canals that connect lacunae | Canaliculi |
| The____ _____ is the site of long bone growth | epiphyseal plate |
| Factors Affecting Bone Growth | Growth Hormone IGFs Thyroid hormone and insulin,Sex steroids Calcitonin and Parathyroid hormone |
| Lateral bending of vertebral column | Scoliosis |
| Increase in the thoracic curve of the vertebral column | Kyphosis |
| Increase in the lumbar curve of the vertebral column | Lordosis |
| A genetic bone disorder, also known as “brittle bone disease” | Osteogenesis Imperfecta |
| Bone resorption outpaces bone development Can be due to calcium loss. Bone mass becomes so depleted that fractures can occur spontaneously | Osteoporosis |