Thursday, December 30, 2010

Promoting Healthy Bones

At what age do I need to be concerned about my bones?

Bone healthy actions should begin in childhood and continue throughout your lifetime. However, it is never too late to take action to promote healthy bones.

Bones healthy actions are the keys to enable you to build and maintain strong bones. These include:
1. Eating a well-balanced diet.
2. Participating in regular exercise, especially in the morning to expose to vitamin D from sunlight.
3. Do bones scanning at professional bone center / hospital.
4. Limiting alcohol intake.
5. Avoiding excessive dieting and excessive thinness.
6. Avoiding unhealthy drinks like carbonated soft drinks and limiting excessive coffee and tea.

Our Bones are Alive !

Our Bones are Alive !


THE PROCESS OF RESORPTION OF BONES


Bones is a living and growing tissue. Bone tissue consists, in large part, of intercellular substance called "bone matrix", consisting mainly of calcium and phosphorus which give bone its hardness, plus organic collagen fibers which give it flexibility and strength. Throughout life, bone is constantly being renewed in a process called resorption/ remodelling. There are two main cells which involve in the process which is osteoclast and osteoblast. During resorption, old bone is removed by osteoclast and it is replaced with fresh new bones by the osteblast. Bone building occurs when more bone is laid down than removed. Bone mass is maintained when bone formation equals bone removal. Bone loss occurs when more bone is removed than replaced. The main goal in preventing osteoporosis is to minimise bone loss by modulating the activity of the osteoclast, while supporting robust osteoblast, or bone-building activity. To a large extent, this dance is hormonally controlled - so at midlife it becomes more of a challenge to keep the remodelling process running smoothly.

Tuesday, December 28, 2010

Where will you be without your Bones?

Where would you be without your bones? Every single person has a skeleton made up of many bones. These bones give your body structure, let you move in many ways, protect your internal organs, and more. It's time to look at all your bones — the adult human body has 206 of them!
What are bones made of?
If you've ever seen a real skeleton or fossil in a museum, you might think that all bones are dead. Although bones in museums are dry, hard, or crumbly, the bones in your body are different. The bones that make up your skeleton are all very much alive, growing and changing all the time like other parts of your body.
Almost every bone in your body is made of the same materials:
*       The outer surface of bone is called the periosteum (say: pare-ee-os-tee-um). It's a thin, dense membrane that contains nerves and blood vessels that nourish the bone.
*       The next layer is made up of compact bone. This part is smooth and very hard. It's the part you see when you look at a skeleton.
*       Within the compact bone are many layers of cancellous bone, which looks a bit like a sponge. Cancellous bone is not quite as hard as compact bone, but it is still very strong.
*       In many bones, the cancellous bone protects the innermost part of the bone, the bone marrow. Bone marrow is sort of like a thick jelly, and its job is to make blood cells.
How Bones Grow
When you were a baby, you had tiny hands, tiny feet, and tiny everything! Slowly, as you grew older, everything became a bit bigger, including your bones.
A baby's body has about 300 bones at birth. These eventually fuse (grow together) to form the 206 bones that adults have. Some of a baby's bones are made entirely of a special material called cartilage. Other bones in a baby are partly made of cartilage. This cartilage is soft and flexible. During childhood, as you are growing, the cartilage grows and is slowly replaced by bone, with help from calcium.
By the time you are about 25, this process will be complete. After this happens, there can be no more growth — the bones are as big as they will ever be. All of these bones make up a skeleton that is both very strong and very light.