Lakmi

  How modern communication methods have enhanced the quality of human life.           Communication is a process of transferring one’s feeling or ideas to an another by dialogue writing and expression. This can be observed even among animals. For example, deer in case of danger, inform others and run away calling for others. In the past there was not much of facilities for communication. The people had used various methods of sending massages. Our history says birds were selected to carry the massages to the destiny. Gira sandeshaya, Salalihini sandeshaya, Savul sandeshaya are the examples for this. The drums were used by the kings to send massages to the citizens.           Electronic equipment has taken the leading place in this task. With the advance of science, the field of communication has improved a lot. The printing media in Sri Lanka was started in the beginning of 18 th century...

  The Taj Mahal        The Taj Mahal is located on the right bank of the Yamuna River in a vast Mughal garden that encompasses nearly 17 hectares, in the Agra District in Uttar Pradesh. It was built by Mughal Emperor Shah Jahan in memory of his wife Mumtaz Mahal with construction starting in 1632 AD and completed in 1648 AD, with the mosque, the guest house and the main gateway on the south, the outer courtyard and its cloisters were added subsequently and completed in 1653 AD. The existence of several historical and Quadratic inscriptions in Arabic script have facilitated setting the chronology of Taj Mahal. For its construction, masons, stone-cutters, inlayers, carvers, painters, calligraphers, dome builders and other artisans were requisitioned from the whole of the empire and also from the Central Asia and Iran. Ustad-Ahmad Lahori was the main architect of the Taj Mahal.      The Taj Mahal is considered to be the greatest architectural ach...

 Antibiotics What are antibiotics?  -Antibiotics are medicines that fight bacterial infections in people and animals. They work by killing the bacteria or by making it hard for the bacteria to grow and multiply. Antibiotics can be taken in different ways: Orally (by mouth). This could be pills, capsules, or liquids. Topically. This might be a cream, spray, or ointment that you put on your skin. It could also be eye ointment, eye drops, or ear drops. Through an injection or intravenously (I.V). This is usually for more serious infections. What do antibiotics treat? Antibiotics only treat certain bacterial infections, such as strep throat, urinary tract infections, and E. coli. You may not need to take antibiotics for some bacterial infections. For example, you might not need them for many sinus infections or some ear infections. Taking antibiotics when they're not needed won't help you, and they can have side effects. Your health care provider can decide the best treatment for ...

 Introduction to nutrition   Nutrition is defined as the processes by which an animal or plant takes in and utilises food substances. Essential nutrients include protein, carbohydrate, fat, vitamins, minerals and electrolytes. Normally, 85% of daily energy use is from fat and carbohydrates and 15% from protein. In humans, nutrition is mainly achieved through the process of putting foods into our mouths, chewing and swallowing it. The required amounts of the essential nutrients differ by age and the state of the body, for example: physical activity, diseases present (e.g. prostate cancer, breast cancer or weakened bones – known as osteoporosis), medications, pregnancy and lactation. Why is nutrition important?   -Nutrition is essential for growth and development, health and wellbeing. Eating a healthy diet contributes to preventing future illness and improving quality and length of life. Your nutritional status is the state of your health as determined by what you eat. The...

  Lungs        The lungs are a pair of spongy, air-filled organs located on either side of the chest (thorax). The trachea (windpipe) conducts inhaled air into the lungs through its tubular branches, called bronchi. The bronchi then divide into smaller and smaller branches (bronchioles), finally becoming microscopic.      The bronchioles eventually end in clusters of microscopic air sacs called alveoli. In the alveoli, oxygen from the air is absorbed into the blood. Carbon dioxide, a waste product of metabolism, travels from the blood to the alveoli, where it can be exhaled. Between the alveoli is a thin layer of cells called the interstitial, which contains blood vessels and cells that help support the alveoli.      The lungs are covered by a thin tissue layer called the pleura. The same kind of thin tissue lines the inside of the chest cavity -- also called pleura. A thin layer of fluid acts as a lubricant allowing the lungs to sl...

  Communicable diseases spread mainly  through vectors Malaria  Descriptions  • Malaria  is  an  acute  infectious  disease caused  by  protozoa  transmitted  to  the blood  stream  through  mosquito  vectors Filaria   • Causative  agent  is  parasite  • The  filaria  worm;  Wuchereria  Bancroft  • Adult  worm  lives  in  the  lymphatic  system  of a  man,  producing  live  embryos  which  find their  way  to  the  blood  stream  • The  vector  for  filariasis  is  the  Culex  mosquito Dengue • This  is  commonest  arthropod  born  viral infection  in  human  • 5  to  100  million  cases  occur  every  year with  over  10000  deaths ...