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TODAY THE QUESTION IS ........

Why should we brush our teeth?

* teeth are made up of hard material and seem impossible to get through. But, bacteria can attack them if there is any food left on or around the teeth. this left-over food on the teeth begins to form a hard material called plaque. bacteria grows in plaque and start to eat away the enamel layer of tooth. If this continues, soon a cavity is form that can reach into the teeth pulp of the tooth, exposing the nerve endings. This results in a very painful toothache. if the infection reaches the root, the bacteria attack the bone on which the tooth is set causing an extremely painful abscess. To prevent teeth from decaying, it is very  necessary to brush them after every meal

  

A PIC OF A HUMAN TEETH

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How does your liver work?

* The liver is the largest organ in the body weighing between 1.36 and 1.81 kg. Your liver works in many ways. You eat protein in various forms both vegetarian and animal in origin and form raw proteins. the liver has to create proteins acceptable to the body by first breaking them down and then actually re-building them.

   The liver also makes certain proteins , such as the blood clotting protein fibrogen. The liver turns carbohydrates into two forms. one is instant energy in the form of glucose and the other is stored energy in the form of glycogen. the liver produces a hormone, which can store access sugar present in the blood as glycogen.

    Fats are turned by the liver into forms, which deposit under the skin and act as insulation and shock absorber. Bile is a thick yellow or greenish fluid made in liver.

   It neutralizes the acidity of partly digested food in the intestine, so that enzymes can continue to work in the intestine. the liver is also a storage organ. Several vitamins, iron removed from blood pigment ect., are stored in the liver. The liver also neutralizes poisons and wastes.  

parts of a liver

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Where does the Digestion begin?

* Digestion begins in the mouth where food is grinded into smaller particles and then the chewed food is mixed with saliva, to make it soft so that it can easily travel down through esophagus.

   As food passes through the body, it is mixed with enormous amount of chemicals, which make the food particles down into small units, which can be easily absorbed into the blood and lymph system.

  Digestive juices are also secreted by the liver and the pancreas  that break down the food particles as it passes through the digestive ducts. All the food particles that we eat cannot be digested, so the waste is eliminated from the body.

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In how many parts is the skeleton divided?

* The skeleton is divided into two main parts. The axial skeleton and The appendicular skeleton.

   The axial skeleton consists of the skull, the spine, the ribs and the stream and has 80 bones.

  The appendicular skeleton includes two limb gridles and their attached limb bones. This part of skeleton system consists of 126 bones.

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Today its time to learn about............

What is the function of skeleton?

* The average human adult skeleton has 206 bones joined to ligaments and tendons. skeleton forms a protective and a supportive framework for the attached muscles and tissues. The skeleton helps in the movement by providing an independently movable lever that pulls different parts of the body.

   It also supports and protects the internal body organs. Apart from this, it produces red blood cells from the bone marrow of certain bones and white cells from the marrow of other bone sin order to destroy the harmful bacteria.

HUMAN SKELETON

 PLANT DIVERSITY

There are two types of plants..

• Flowering plants
• Non - Flowering plants                        

                                           

                                                            view of a garden

What is meant by flowering plant?

*the plants which produces flower is called as flowering plants

What is meant by non-flowering plants?

*the plants which do not produce flower is called non-flowering plants

There are two types of root system 

• Taproot system
• Fibrous root system
  
  
  

EXAMPLES FOR TAPROOT AND FIBROUS ROOT SYSTEM

• TAPROOT - Mango , Cashew  ......

•  FIBROUS ROOT - Coconut , Arecanut   .....  

                                                            THE END..

                                          IFRAH IFLAL😊

 

 Hi Everyone

welcome to science grade 7

This is Ifrah Iflal 

This is my first blog

             WELCOME EVERYONE