University:
Texas A&M University
Course:
BIOL 319 | Integrated Human Anatomy and Physiology I
Academic year:

2020
Views:

97

Pages:

13
Author:

Arielle Armstrong

Images of compact bone Please subscribe FUNCTIONS OF BONE SKELETAL SUPPORT LAND ANIMALS PROTECTIVE ENCLOSURE SKULL TO PROTECT BRAIN LONG BONE TO PROTECT HEMOPOIETIC CELLS COMPACT BONE - SHAFT AND OUTER SURFACE OF LONG BONES Compact Spongy Spongy Periosteum Compact bone Vertebra Fibrous periosteum containing fibroblasts Spongy bone Spongy bone Bone Endosteum Osteocyte in lacunae Endosteum Osteoblasts lining bony trabeculae CELLS OF BONE OSTEOBLASTS - SECRETE OSTEOID - BONE – EXPAND BONE BY APPOSITIONAL GROWTH OSTEOCYTE = OSTEOBLAST TRAPPED IN MATRIX OF BONE EXTRACELLULAR MATRIX OF BONE SECRETED by POLARIZED OSTEOBLASTs CALCIFICATION - ADDS FIRMNESS, BUT PREVENTS DIFFUSION THROUGH MATRIX MATERIAL Osteocytes EXTRACELLULAR MATRIX OF BONE FORMS LACUNAE AND CANALICULI - EXTRACELLULAR MATRIX OF BONE FORMS LACUNAE AND CANALICULI - CAUSES THE NEED FOR NUTRIENTS TO PAST THROUGH THE MANY GAP JUNCTIONS BETWEEN OSTEOCYTES VIA CANALICULI COMPACT BONE, (Spongy bone) REMODELING COMPACT BONE, (Spongy bone) REMODELING COMPACT BONE HAVERSIAN SYSTEMS LAMELLAE OF BONE AROUND HAVERSIAN CANAL Osteon or Haversian systems Compact bone (ground cross section) Volkmann’s canal Canaliculli Concentric lamellae Osteon/ Haversian systems Haversian canal Lacunae containing osteocyte Interstitial lamellae Compact bone (ground cross section) Connecting adjacent osteons, perforating (Volkmann’s) canals provide communication for osteons and another source of microvasculature for the central canals of osteons (nutrients, blood, etc.). Volkmann’s canal