EducatorSharmin

Excretory System  Biology  1. What is dialysis? Ans: When kidney failure happens then the process of purifying blood by scientific method is named dialysis. Usually, with the help of kidney machine, blood can be purified. 2. What is the Malphigian organ? Ans: Malphigian organ is the structural organ of the nephron which is composed of the glomerulus and Bowman’s capsule. 3. What is the pelvis? The outer side of the kidney is convex and inner side is concave having an indentation called hilus the chamber in the hilus is pelvis. 4. What are the excretory products? Ans: Basically excretory products mean nitrogenous waste. Human excretory product is expelled from the body as urine. Almost 90% of water is the component of urine. Other components are urea, uric acid, creatinine, and different kinds of salts. 5. What are kidney stones? Ans: Small stones like substance produced by kidney is known as kidney stone. Any one can be attacked by these disease. But it has been noticed that t...

  Biology  Chapter- 7 Exchange of Gases Q. 1. What is cellular respiration? Ans: A series of metabolic process  that take place within a cell in which biochemical energy is harvested from organic substance and stored as energy carries ATP for use in energy-requiring activities of the cell is called cellular respiration. Q.2. What is the function of Pleura? The inner surface of the lung is covered by a double layered membrane which is named as pleura. Space between the two layers contains one type of fluid. Pleura saves lungs from friction as the lungs rub against the thorax during breathing. Q.3. What is Bronchitis? Acute and chronic inflammation of the inner lining of any partof the bronchi and bronchial tube is called bronchitis. The disease is caused by bacterial infection. Living in the unhealthy conditions, inhaling dust, pollution air, smoking cigarettes and cold are some of the reasons that may cause bronchitis. Once attacked by bronchitis there is every possibilit...

            Exploring  The Universe Astronomy, the scientific study of stars, planets, satellites, comets, meteors, meteorites, and asteroids, collectively called celestial or heavenly bodies, has developed considerably in recent years. Today, our knowledge of the universe, the vast limitless space that contains celestial bodies, is far more accurate than it was in the older days. Now we know far more about the universe and celestial bodies that exist in the universe. In addition to celestial bodies, the universe also contains gas and dust particles. Nebulae: The universe is full of glowing clouds of gas and dust between stars. Some give out their own light, while others reflect light from nearby stars. Some clouds are dark or black. This is because they blot out the light of stars behind them. These clouds of gas and dust particles, floating in space, are called nebulae. Often the force of gravity pulls the particles of gas and dust closer into a mass...