It's us
Though we're small in numbers but we have big powers!
List of people
Bio assignment due on 27JAN
Name of people who had completed will be bold.
Allie ; April ; Crystal ; Denise ; Indira ; Saranya ; Sheryl ; Jesslyn ; Siauxin ; Yunji ; Huiming ; Ruelia ; Peizhen ; Dingheng ; Weesiang ; Zhengguang ; Weixhan ; Weikai ; Issac ; Fengye
P/S: Click on your name, your post will appear.
PICTURE PICTURE
Linkage
Allie
Crystal
Sheryl
Jesslyn
Huiming
Lau Wee Siang
What happened?
January 2010
February 2010
Thanks
Blogskins.com
LSX
} Believe it or not, BONE is a Living Thing!
Wednesday, January 27, 2010 @ 2:33 PM
MINI FACTS ABOUT BONES
A bone in a body consists of both living tissues and non-living substances and is found in all vertebrates. It gives body the structure and protects internal organs. Within the bones, there are blood vessels nerves, collagen and living cells including osteoblasts which are cells to form the bone and osteoclasts which are cells that help to eat away old bones.
Like human beings do, bones also undergo the following processes.
NUTRITION
The growth, development and maintenance of healthy bones require many different nutrients such as calcium, vitamin D, phosphorous, magnesium and protein to make the bones hard and support body weight.
MOVEMENT
Bones can move because of the way they are joined together. The place where two or more bones meet is called a joint. The bones at a joint are held together by strong bands of tissue called ligaments which allow the bones to move. Some examples of such movable joints can be found at the shoulder where the ball and socket joints allow us to swing our arms in a circular motion and at the knee where the hinge joint allows the leg to move back and forth in one direction. It is also found at the neck where the pivot hinge allows the neck to twist and rotate slightly.
REPRODUCTION
Reproduction is the production of new individuals for the survival of the species.
An international team of biomedical engineers has demonstrated for the first time that it is possible to grow healthy new bone reliably in one part of the body and use it to repair damaged bone at a different location. This indicates the ‘production’ of these new individual organisms – bones through the biological process that can also be known as reproduction.
SENSITIVITY/ADAPABILITY
Bone is especially sensitive to the impact of weight and pull of muscle during exercise as well as other physical activities. Therefore it responds by building stronger, denser bones. Continual physical stress stimulates calcification and osteoblastic deposition of bone, producing stronger bones.
GROWTH
Things change over time, so are bones!
When you were a baby, you had tiny hands, tiny feet. Slowly, as you grew older, everything became bigger, including your bones.
A baby's body has about 300 bones at birth. Some of a baby’s bones are made of a soft and flexible material called cartilage. When one grows up, the cartilage grows and is slowly replaced by bone, with help from calcium. They eventually fuse together to form the 206 bones that adults have. The bones can continue to grow until one reach the age of about 21 years old.
EXCRETION
In bones, there are bone tissues and these tissues store several minerals, including calcium and phosphorus. When required, bone ‘excretes’ minerals into the blood to facilitate the balance of minerals in the body.
HOMEOTASIS
The skeletal system constantly remodels old bone tissue with new ones. The metabolism of bone tissue is a continuous process, as new tissue is formed to replace either old bone matter or injured tissue. The main work in the metabolism of bones is accomplished by osteoclasts and osteoblasts. Osteoclasts destroy old tissue and get rid the metabolism of minerals and collagen. On the other hand, the osteoblasts begin the process of bone formation and enrich the metabolism with minerals and collagen, so that there is enough calcium and minerals to form the bones which can grow properly and remain strong throughout our lives.
Bone homeostasis occurs when all the elements in the system works properly.
RESPIRATION
The bone tissues in the bones undergo tissue respiration which is the release of energy to enable it to grow and move and for other processes too.
In conclusion, bone is a LIVING THING since it fulfils all the criteria to be grouped under living things.
Done by: Lee Zhen Guang