Osteoporosis is a skeletal disorder characterized by low bone mass, ... of
estrogen replacement therapy, from 3 percent to 7 percent per year, building to
15 percent ... a decrease in the replacement of old bone with new bone tissue
Bone cells, which are found within the bone tissue, are responsible for the make-up of the skeleton of vertebrates. There are different types of bone tissue in a bone that are made up of different bone cells: there is the compact tissue which is the hard outer part of the bone, the cancellous tissue which is all the spongy tissue inside of the compact tissue, and the subchondral tissue which is the smooth tissue at the end of each bone. Bone cells all work together inside of the bones to help keep up the skeletal system. The bone cells do many things for the skeletal system such as the development of new bones, the maintenance of bones, and the regulation of minerals in the body.
At any given time about 5% of the total bone mass in your body is being remodeled. Renewal rate for compact is 4% / year and 20% / year. From the Principles of anatomy and physiology 13th edition. Gerald J Tortora& Bryan Derrikson. Chapter 6 The Skeletal system:Bone tissue. Page 194 Sub heading Remodeling of Bone
Each kind of cell has a unique characteristics such as shape, size, flexibility, color, and texture. Bone cells combine with other bone cells make bone tissue and so on.
Ligaments connect bone to bone. Tendons attach muscle to bone.
The elastic tissue between each bone in the spine is called as intervertebral disc. It allows movement of vertebral bodies and also acts as shock absorber to the spine.
Articular cartilage
GROUP OF CELLS FORM TISSUE ..SO BONE TISSUE IS FORMED OF FIVE TYPES OF BONE CELLS. Bone tissue contains five basic types of bone cells. There are cells which are responsible for the response of the body to trauma and fracture, and those which secrete the basic chemical compound which bones are made of. There are cells mature bone cells and cells that break down the bone tissue. All bone cells have a particular function and each is needed for bones to retain their strength, develop, heal, and grow.
The lacunae of osseous tissue contain osteocytes, which are mature bone cells that maintain the bone tissue. These cells are embedded within the mineralized matrix of the bone and are connected to each other and to the blood supply through tiny channels called canaliculi. Osteocytes play a key role in bone remodeling and responding to mechanical stresses placed on the bone.
Bone tissue appears almost exactly like the cross section of a tree. Each individual tree represents the functional unit of bone connective tissue, or an osteon. The center circle is called the Haversian, or central, canal. The blood and nerve supply of bone (remember, it's a living tissue; therefore, oxygen is delivered to bone via red blood cells and carbon dioxide is taken away) runs through the Haversian canal.
The six major types of connective tissue are loose connective tissue, dense connective tissue, adipose tissue, cartilage, bone, and blood. Each type serves specific functions in the body, such as providing support, insulation, and flexibility.
Ligaments are strong and flexible and connect bones to each other.
3 to 5 percent