Friday, July 19, 2019
The Skeletal System Essay -- essays research papers
Chapter 7 I.Bone Structure A.Ã Ã Ã Ã Ã Bone Classification 1.Ã Ã Ã Ã Ã 4 Classes Ã¢â¬â Long, Short, flat and irregular 2.Ã Ã Ã Ã Ã Example of a long bone- forearm and thigh bones. 3.Ã Ã Ã Ã Ã Short Bones are shaped like cubes 4.Ã Ã Ã Ã Ã Ex. Of short bones are in wrists and ankle bones 5.Ã Ã Ã Ã Ã Flat bones are platelike structures 6.Ã Ã Ã Ã Ã Ex of Flat bones are platelike structures 7.Ã Ã Ã Ã Ã Irregular bones vary in size 8.Ã Ã Ã Ã Ã Irregular bones vary in size 9.Ã Ã Ã Ã Ã Examples of irregular bones are those of the vertebra and some facial bones 10.Ã Ã Ã Ã Ã Round bones are also called sesamoid bones i.Ã Ã Ã Ã Ã They are small and modular and embedded in tendons ii.Ã Ã Ã Ã Ã Example is the patella (kneecap) B.Ã Ã Ã Ã Ã Parts of a long bone 1. Ã Ã Ã Ã Ã An expanded end of a long bone is an epiphysis 2.Ã Ã Ã Ã Ã An epiphysis articulates with another bone 3.Ã Ã Ã Ã Ã Articular Cartilage is located on the epiphysis 4.Ã Ã Ã Ã Ã The shaft of a long bone is called a diaphysis 5.Ã Ã Ã Ã Ã Periosteum functions t form and repair bone tissue 6.Ã Ã Ã Ã Ã Periosteum is a tough, vascular, fibrous membrane covering the diaphysis of a bone 7.Ã Ã Ã Ã Ã Processes provide sites for attachment of tendons or ligaments 8.Ã Ã Ã Ã Ã The wall of the diaphysis is composed of compact bone 9.Ã Ã Ã Ã Ã Compact bone has no gaps 10.Ã Ã Ã Ã Ã Ephiphysis is composed of spongy bone 11.Ã Ã Ã Ã Ã Spongy bone consists of bony plates called trabeculae 12.Ã Ã Ã Ã Ã A bone is composed of spongy and compact bone 13.Ã Ã Ã Ã Ã A canal called the medullary cavity runs through the diaphysis 14.Ã Ã Ã Ã Ã The endosteum lines this cavity and spaces of the spongy bone 15.Ã Ã Ã Ã Ã Endosteum contains bone forming cells 16.Ã Ã Ã Ã Ã The tissue that fills the spaces of the bone is called marrow 17.Ã Ã &nb... ...ome osteocytes 11.Ã Ã Ã Ã Ã Periosteum comes from cells of the primitive conncective tissue that persist outside of the developing bone. 12.Ã Ã Ã Ã Ã Compact bone is formed by osteoblasts on the inside of periosteum 13.Ã Ã Ã Ã Ã Intramembranous ossification is the process if replacing connective tissue to form an intramembranous bone. D.Ã Ã Ã Ã Ã Endochondral Bones 1.Ã Ã Ã Ã Ã Most of the bones are these types of bone 2.Ã Ã Ã Ã Ã They develop as masses of hyaline cartilage 3.Ã Ã Ã Ã Ã Eventually the cartilage decompses forming periosteum from connective tissue that encircles that developing structure 4.Ã Ã Ã Ã Ã Blood vessels and undifferentiated connective tissue cells invade the disintegrating tissue 5.Ã Ã Ã Ã Ã Some of these cells become osteoblasts 6.Ã Ã Ã Ã Ã Ostoeblasts form the spongy bone in the spaces previously housed by cartilage 7.Ã Ã Ã Ã Ã Endochondral ossification is the process of forming an endochondral bone by the replacement of hyaline cartilage.