1 / 18

Skeletal System pt. 2

Skeletal System pt. 2. Microscopic Structure of Bones Bone Development. Agenda. Do Now Introduce: Microscopic Structure of Bone Bone Matrix Diagram Introduce: Bone Growth and Development Assign: Chapter Project Homework Question Exit Ticket. Microscopic Structure.

iago
Télécharger la présentation

Skeletal System pt. 2

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Skeletal System pt. 2 Microscopic Structure of Bones Bone Development

  2. Agenda • Do Now • Introduce: Microscopic Structure of Bone • Bone Matrix Diagram • Introduce: Bone Growth and Development • Assign: Chapter Project • Homework Question • Exit Ticket

  3. Microscopic Structure • Osteocytes (osteo-: bone, -cyte: cell) are located in small cavities in the matrix called lacunae. • The extracellular (extra-: outside) matrix in bone tissue is hard material composed of collagen and inorganic salts • Bones also contain nerves (ouch!) and blood vessels.

  4. Microscopic Structure • Lacunae are connected by canaliculi(singular: canaliculus). This is how the cells share nutrients and communicate. • Where do the blood vessels and nerves come in? • Lacunae are arranged in concentric (co:- same, -centric: center) circles around osteonic canals. • The group of rings that share the same osteonic canal are called an osteon • The vertical osteoniccanals are connected transversely by communicating canals.

  5. Whiteboard Practice

  6. Multiple Choice A: Osteon B: Osteonic Canal C: Periosteum D: Spongy Bone ?

  7. Multiple Choice A: Lacuna B: Osteonic Canal C: Periosteum D: Spongy Bone ?

  8. Multiple Choice A: Osteon B: Osteonic Canal C: Periosteum D: Spongy Bone ?

  9. Multiple Choice A: Osteon B: Osteonic Canal C: Periosteum D: Spongy Bone ?

  10. Multiple Choice • Identify the Lacunae A B

  11. Multiple Choice • Identify the Canaliculi A B

  12. Bone Development and Growth Intramembranous Bones: Flat Bones • Develop from sheet-like masses of connective tissue that form where future bones will be located

  13. Intramembranous Bone

  14. Endochondral Bone • Long Bones • Develop from masses of hyaline cartilage shaped like bones.

  15. Long Bone Growth • In the developing body, the epiphysealdisk separates the diaphysicossification center and the epiphysic ossification center. • The epiphyseal disk is a layer of cartilage that allows bones to continue to grow in length. • When the growth centers meet and the cartilage disappears, the bone can no longer grow in length.

  16. Chapter Project

  17. Homework Questions • How can the epiphysial disk sustain damage? • What happens if this disk is damaged? Write your answers into your notes. Come to class tomorrow prepared to discuss.

  18. Exit Ticket A • Epiphyseal Disk • Epiphysic Ossification Center • Diaphysic Ossification Center B C D

More Related