What is cartilage?

Cartilage

Most of the skeleton consists of hard bones. However, at some places in the skeleton there is a material ich is not as hard as bones and which can be bent. It is called cartilage. So, we can now say that though most of the skeleton is made of bones but it has some cartilage too Cartilage is a firm but flexible material d at some places in the skeleton Cartilage is much softer than bone. Cartilage can be bent without haking. In fact, cartilage is a kind of softer and elastic bone Cartilage is present in the following places in our body :

Cartilage

Cartilage is present in the pinnae of ears (upper part of ears) Cartilage is found at the end of nose. Cartilage is found on the end of bones where they meet one another at a joint Cartilage is also present (as cartilage discs) between the vertebrae of backbone.

The upper part of our ear is called pinna and the lower part aled ear lobe. If we press the pinna of our ear and the ear lobe been our fingers, turn by turn, we will find that the pinna is harder the ear lobe (see Figure 8). The pinna (upper part) of our ear s cartilage. Cartilage gives support and shape to the ear. Clage is flexible that is why we can bend the pinna of our ear quite without the danger of breaking.

Feel the end of your nose. We can bend the nose easily. There is a cartilage in the end of our nose. It is the presence of cartilage which gives support and shape to our nose. From the above discussion we endide that cartilage gives support and shape to organs like ears and nose.

Camilage is also found on the ends of bones where they meet one another at a joint. Cartilage is smooth. The layer of smooth cartilage reduces friction and allows the ends of bones to move easily over each ther without damaging them. Thus, cartilage is found in the joints of our body.

Discs of cartilage are present between the various small bones (vertebrae) of the backbone. The presence Milage discs between vertebrae makes the backbone flexible, so that it can bend. The cartilage discs aborb the shocks when we run, jump, or do other such activities.

What are life process?

WHAT ARE LIFE PROCESSES? The maintenance functions of living organisms must go on even when they are not doing anything particular. Even when we are just sitting in class even if we are just asleep, this maintenance job has to go on The processes which together perform this maintenance job an We processes . Since these maintenance processes are needed to prevent damage and break-down energy is needed for them. This energy comes from outside the body of the mdhadual organism. So there must be a process to transfer a source of energy from outside the body of the organism which we call food, to the inside, a process we commonly call nutrition If the body size of the organisins is to grow, additional raw material wit also be needed from outside. Since life on earth depends on carbon- based molecules most of these food sources are also carbon-based Depending on the complexity of these carbon sources, different organisms can then use different kinds of nutritional processes The outside sourc...

Nutrition in human being?

Nutrition in Human Beings The alimentary canal is basically a long tube extending from the mouth to the anus. we can see that the tube has different parts. Various regions are specialised to perform different functions. What happens to the food once it enters our body? We shall discuss this process here. We eat various types of food which has to pass through the same digestive tract, Naturally the food has to be processed to generate particles which are small and of the same texture. This is achieved by crushing the food with our teeth, Since the lining of the canal is soft, the food is also wetted to make its passage smooth. When we eat something we like, our mouth waters. This is actually not only water..but a fluid called saliva secreted by the salivary glands. Another aspect of the food we ingest is its complex nature. If it is to be absorbed from the alimentary canal, it has to be broken into smaller molecules. This is done with the help of biological catalysts called enzyme...

Adaptation in lion & adaptation in deer

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