1.  The Skeletal System - 2

2. Anatomy of a Long Bone  Diaphysis  Shaft  Mostly compact bone

3. Anatomy of a Long Bone  Periosteum  Outside covering of the diaphysis  Fibrous connective tissue  Sharpey ’ s fibers  Secure periosteum to underlying bone  Arteries  Supply bone cells with nutrient

4. Anatomy of a Long Bone

6.  Epiphysis  Ends of the bone  Composed mostly of spongy bone

7. Anatomy of a Long Bone  Articular cartilage  Covers surface of the epiphyses  Decreases friction at joint surfaces

8. Anatomy of a Long Bone  Epiphyseal plate  Flat plate of hyaline cartilage seen in young, growing bone  Epiphyseal line  Remnant of the epiphyseal plate  Seen in adult bones

9. Anatomy of a Long Bone

11.  Medullary cavity  Cavity inside of the shaft  Contains yellow marrow (mostly fat) in adults  Contains red marrow (for blood cell formation) in infants

12. Bone Markings  Are bones smooth surfaces?  Femur

13.  Are bones smooth surfaces?  Tibia

14. Bone Markings  Are bones smooth surfaces?  Mandible

15. Bone Markings  Are bones smooth surfaces?  Optical canal

16. Compact vs. Spongy bone

17. Microscopic Anatomy of Compact Bone  Osteocytes: mature bone cells  Lacunae:

18. Microscopic Anatomy of Compact Bone  Lamella:

19. Microscopic Anatomy of Compact Bone  Central (Haverersian) Canals:

20. Microscopic Anatomy of Compact Bone  Central (Haverersian) Canals:  RUN LENGTHWISE!

21. Microscopic Anatomy of Compact Bone  Osteon (Haversian System):

22. Microscopic Anatomy of Compact Bone

23.  Canaliculi:  Hint: which way do central canals run?

24. Microscopic Anatomy of Compact Bone

25.  This eleaborate network of canals ensures bone cells are well nourished  What significance does this have?

26.  Perforating (Volkmann’s) canals:  Run through compact bone at right angles to the shaft

30. Matching Game  http://tle.westone.wa.gov.au/content/file/969144ed-0d3b- fa04-2e88- 8b23de2a630c/1/human_bio_science_3b.zip/content/003_mus culo_skeletal_support/page_06.htm