Articles [Arts & Science]

Health and hygiene Diseases can be broadly categorized as non communicable and communicable diseases. Communicable diseases are caused by germs can spread from one person to another. Non communicable diseases, on the other hand, do not spread from...

The endocrine system Besides the nervous system, the other system which controls and coordinates many of the body’s activities is the endocrine system. This consists of several glands, called the endocrine glands. These glands secrete chemical...

Transport of water The roots, with the help of root hairs, absorb water and together with it, minerals from the soil. Hairs are produced in large numbers by each root, as outgrowths of the epiblema. These are unicellular structures; resembling...

Reproduction, growth and development Every organism starts as a single cell called the zygote. The sequence of changes that an organism goes through from the time when its existence begin as a zygote till its death is called its life cycle. This...

  INTRODUCTION Society in general has become aware about the conservation of resources and protection of environment. Though the awareness has come after a great loss to the environment in the form of global warming, acid rain and ozone depletion...

  AIR Air (containing oxygen) is a vital requirement for sustaining life. Initially on the atmosphere of earth there was no oxygen and even then the life was there. Slowly the  oxygen  requiring  organisms  developed  with  the  evolution  of ...

In ancient times, people moved from place to place, hunting animals and gathering fruit and seeds. When they noticed tat seeds thrown away could germination and grow into plants, they started sowing seeds near their caves, and this gave rise to the...

Malfunctioning of organs The malfunctioning of organs gives rise to different disease conditions or diseases. While deficiency diseases can be cured by correcting the diet, diseases caused by the malfunctioning of organs are difficult to cure...

We are constantly surrounded by germs, but do no fall or remain ill continuously because our body has certain natural Defence against invasions by microorganisms. The first line of Defence This consists of barriers like hairs, mucous membranes...

Control and coordination Many processes go on inside the body of a living being, or example, digestion, respiration and growth. These processes do not go on independently. They are related to each other and to the body’s general needs. They are...