About Me
It is my first time to say hello and do some self introduction to everybody here online. My name is Ashis.P.Donthi, male, 27, from Bangalore, India. I like reading, and do some collections in my spare time.
About Me
It is my first time to say hello and do some self introduction to everybody here online. My name is Ashis.P.Donthi, male, 27, from Bangalore, India. I like reading, and do some collections in my spare time.
About Me
It is my first time to say hello and do some self introduction to everybody here online. My name is Ashis.P.Donthi, male, 27, from Bangalore, India. I like reading, and do some collections in my spare time.
About Me
It is my first time to say hello and do some self introduction to everybody here online. My name is Ashis.P.Donthi, male, 27, from Bangalore, India. I like reading, and do some collections in my spare time.
About Me
It is my first time to say hello and do some self introduction to everybody here online. My name is Ashis.P.Donthi, male, 27, from Bangalore, India. I like reading, and do some collections in my spare time.
Sunday, August 18, 2013
Spider
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Tuesday, April 23, 2013
Wednesday, April 03, 2013
Bodhidharma - Legend
Bodhidharma was a Buddhist monk who lived during the 5th/6th century CE. He is traditionally credited as the transmitter of Ch'an to China, and regarded as its first Chinese patriarch. According to Chinese legend, he also began the physical training of the Shaolin monks that led to the creation of Shaolinquan.
Little contemporary biographical information on Bodhidharma is extant, and subsequent accounts became layered with legend.
The principle sources, given in various translations, vary on their account of Bodhidharma's origins. Two popular traditions exist regarding Bodhidharma's origins. An Indian tradition regards Bodhidharma to be the third son of a Tamil Pallava king from Kanchipuram, while the Japanese tradition regards Bodhidharma to be from Persia.
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Monday, October 08, 2012
Digestive System in Cockroach
Nutrition in cockroach is holozoic and it is an omnivore, feeding on different kinds of organic matter. It takes in pieces of food and has to grind them before digesting them. Thus its mouth parts are modified accordingly for chewing the food.
The digestive system includes the mouth parts, a pair of salivary glands and the alimentary canal.
Mouthparts of cockroach
To understand the position of the mouth parts, observe the external features of a cockroach in the diagram below.
The body of the cockroach is segmented into three portions head, thorax and the abdomen. The mouth parts are attached to the ventral side (underside) of the head portion and surrounds the mouth or the oral cavity which faces down.
The different mouthparts are -
Labrum or the upper lip
It is a broad, roughly rectangular shaped structure. It hangs from the front edge of the head on the lower side. It covers the mouth and the mandibles.
Mandibles
They are a pair of hard, strong, large, dark coloured triangular structures found one on either side with jagged inner edges and the two mandibles move in horizontal motion and crush food between them.
Maxillae
Maxillae are a pair of structures lying outside and behind the mandibles. Each of them consists of three parts - protopodite, exopodite and endopodite. Protopodite consists of cardo and stipes, exopodite is 5-segemented and sensory, also called maxillary palp and endopodite is made up of inner lacina and outer galea. The maxillae are used to manipulate the food before it enters the mouth.
Labium
It is said to be formed by the fusion of the second pair of maxillae. It forms the broad median lower lip consisting of several parts in addition to a pair of 3-segmented labial palps on either side.
The maxillary and labial palps have sense organs that help them to choose suitable food.
The mandibles and the maxillae grind the food by moving it laterally.
The labrum and labium help to hold the food between the mandibles and the maxillae.
Alimentary canal
Digestion takes place in specialised cavities joined together to form a continuous canal. It is called the alimentary canal.
The alimentary canal is divided into three main portions-
Foregut
Foregut consists of the mouth surrounded by the mouthparts. The mouth cavity is called the pharynx. It continues as the oesophagus that is short, narrow and thin-walled. The canal then enlarges into the crop, which is also thin-walled. The crop opens into a short, muscular organ, the gizzard or the proventriculus. Outside and lying below the crop are a pair of salivary glands.
Each salivary gland is branched, the secretions of all the branches being poured into a common duct. For either pair of salivary glands there is a thin walled salivary receptacle or reservoir which is like a bladder. It stores the salivary secretions. The receptacles of either side have a common receptacular duct which opens into the common salivary duct. This common salivary duct opens into the mouth cavity at the labium.
The entire foregut is lined with chitin. In the gizzard, the chitin forms proventricular teeth and the plate to facilitate grinding of the food.
Midgut
Midgut forms the true gut or the mesenteron and consists entirely of stomach or ventriculus. At the junction of the gizzard and stomach are six pairs of gastric caecae ('gastric' means pertaining to stomach). These are pouch-like structures arranged in a ring-like manner around the anterior end of the stomach. The anterior lobe of each pair of the caecae extends over the proventriculus and the posterior lobe extends over the ventriculus. The caecae secrete digestive juices and pour them into the stomach. The midgut is not lined by chitin or cuticle but by a peritrophic membrane. This membrane protects the stomach wall from abrasions and is fully permeable to enzymes and digested food.
Hindgut
Hindgut is a coiled structure consisting of anterior ileum, middle colon and posterior rectum. The rectum opens to the exterior through the anus. The hindgut is lined by cuticle. At the junction of the stomach and ileum are attached numerous long tubules called the Malpighian tubules.
Mechanism of digestion
Digestion starts in the mouth with the mandibles and the maxillae chewing the food. It is also acted upon by the salivary carbohydrases which partially digests the food. The food is then swallowed with the help of lubrication provided by the salivary juice.
The food then enters the oesophagus and then into the crop. Here, the masticated food is temporarily stored.
The food is then passed into the gizzard which acts as the grinding chamber. At the junction of the gizzard and the stomach is a valve called the stomodael valve. It allows the passage of only the thoroughly digested food into the stomach and also, prevents the regurgitation of food from the stomach.
The ground food, then enters the stomach. The digestive enzymes secreted by the gastric caecae act upon the food in the stomach. These enzymes include amylase, maltase, invertase, tryptase and lipase. The remaining carbohydrates, proteins and fats are digested here.
The digested food is absorbed through the stomach walls into the surrounding space which is called the haemocoel. The haemocoel consists of a large number of fat bodies which are fat cells having fat globules, protein granules and glycogen. They form storage structures. From here, it is transported to the different body parts.
In the hindgut, absorption of water takes place and the undigested food is formed into almost dry pellets. These are excreted through the anus as faeces.
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Hippopotamus - The River Horse
With no sweat glands, hippos keep cool in the water or in mud. But they do secrete a red fluid that helps them avoid sunburn. While most of its body is underwater, a hippo can hear, see, and breathe, since its eyes, ears, and nostrils are on the top of its head and nose. When completely underwater, its nose and ears close automatically.
Hippos live in herds of 10 to 30. The dominant male can mate will all the females in the herd. If challenged, a male hippopotamus will fight using its long canine tusks. These teeth can grow a foot long.
A hippopotamus is born underwater. The mother helps her baby to the surface to breathe. Hippos bear single young. Calves weigh 55 to 120 pounds and nurse underwater. Mother hippos protect them from lions, leopards, crocodiles and male hippos. Sometimes calves will rest on their mother’s back.
Hippos mature at an average age of 7 (males) to 9 (females) years and have a life expectancy of about 45 years. On top they are brownish gray and underneath pinkish. Hippos have good sight, sense of smell, and hearing.
The name hippopotamus comes from 2 Greek words that mean river horse. These animals are aggressive and not afraid of people.
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Monday, April 30, 2012
Superman aka Christopher Reeve

Christopher D'Olier Reeve (September 25, 1952 – October 10, 2004) was an American actor, film director, producer, screenwriter, author and activist. He achieved stardom for his acting achievements, including his notable motion picture portrayal of the fictional superhero Superman.
On May 27, 1995, Reeve became a quadriplegic after being thrown from a horse in an equestrian competition in Virginia. He required a wheelchair and breathing apparatus for the rest of his life. He lobbied on behalf of people with spinal cord injuries, and for human embryonic stem cell research afterward. He founded the Christopher Reeve Foundation and co-founded the Reeve-Irvine Research Center.
Reeve married Dana Morosini in April 1992. Christopher and Dana's son, William Elliot Reeve, was born on June 7, 1992. Reeve also had two children, Matthew Exton Reeve (born 1979) and Alexandra Exton Reeve (born 1983), from his previous relationship with his longtime girlfriend, Gae Exton.

Christopher Reeve was born in New York City on September 25, 1952, the son of Barbara Pitney, a journalist, and Franklin D'Olier Reeve, who was a teacher, novelist, poet and scholar. His paternal grandfather, Colonel Richard Henry Reeve, had been the CEO of Prudential Financial for over twenty-five years, and his great-grandfather, Franklin D'Olier, was a prominent businessman, veteran of World War I, and the first national commander of the American Legion. Reeve's father was also descended from a sister of statesman Elias Boudinot, as well as from Massachusetts governors Thomas Dudley and John Winthrop, Pennsylvania deputy governor Thomas Lloyd, and Henry Baldwin, a US Supreme Court Justice. Reeve's mother was the granddaughter of Mahlon Pitney, another U.S. Supreme Court Justice, and was also a descendant of William Bradford, a Mayflower passenger.
Reeve's father was a Princeton University graduate studying for a master's degree in Russian language at Columbia University prior to the birth of his son, Christopher.
In the late 1980s, Reeve became more active. He was taking horse riding, and trained five to six days a week for competition in combined training events. He built a sailboat, The Sea Angel, and sailed from the Chesapeake to Nova Scotia. He campaigned for Senator Patrick Leahy and made speeches throughout the state. He served as a board member for the Charles Lindbergh Fund, which promotes environmentally safe technologies. He lent support to causes such as Amnesty International, the Natural Resources Defense Council, and People for the American Way. He joined the Environmental Air Force, and used his Cheyenne II turboprop plane to take government officials and journalists over areas of environmental damage. In the fall of 1987, 77 actors in Santiago, Chile were threatened with execution by the dictator Augusto Pinochet. Reeve was asked by Ariel Dorfman to help save their lives. Reeve flew to Chile and helped lead a protest march. A cartoon then ran in a newspaper showing him carrying Pinochet by the collar with the caption, "Where will you take him, Superman?" For his heroics, he was awarded the Grand Cross of the Bernardo O'Higgins Order, the highest Chilean distinction for foreigners. He also received the Obie Prize and the Annual Walter Brielh Human Rights Foundation award.
Reeve took up horse riding in 1985 after learning to ride for the film Anna Karenina. He was initially allergic to horses, so he took antihistamines. He trained on Martha's Vineyard, and by 1989 he began eventing. As with every other sport and activity in which he participated (sailing, scuba diving, skiing, aviation, windsurfing, cycling, gliding, parasailing, mountain climbing, baseball, tennis), he took horse riding seriously and was intensely competitive with it. His allergies soon disappeared.
Reeve bought a 12-year-old American thoroughbred horse named Eastern Express, nicknamed "Buck," while filming Village of the Damned. He trained with Buck in 1994, and planned to do Training Level events in 1995 and move up to Preliminary in 1996. Though Reeve had originally signed up to compete at an event in Vermont, his coach invited him to go to the Commonwealth Dressage and Combined Training Association finals at the Commonwealth Park equestrian center in Culpeper, Virginia. Reeve finished at fourth place out of 27 in the dressage, before walking his cross-country course. He was concerned about jumps sixteen and seventeen, but paid little attention to the third jump, which was a routine three-foot-three fence shaped like the letter 'W'.
On May 27, 1995, Reeve's horse had a refusal. Reeve fell and sustained a cervical spinal injury that paralyzed him from the neck down. He had no recollection of the incident. Witnesses said that Buck started the jump over the third fence, and then suddenly stopped (refusal). Men are more likely to fall forward than women due to their higher center of gravity. Horses are easily spooked, and it is possible a rabbit, shadow or other rodent could have spooked the horse. Reeve held on and the bridle, the bit, and the reins were pulled off the horse and tied his hands together. He landed headfirst on the other side of the fence. His helmet prevented any brain damage, but the impact of his 215-pound (98 kg) body hitting the ground shattered his first and second vertebrae. Reeve had not been breathing for three minutes before paramedics arrived. He was taken to the local hospital, and then flown by helicopter to the University of Virginia Medical Center.

For the first few days after the accident, Reeve suffered from delirium, woke up sporadically and would mouth words to Dana such as "Get the gun" and "They're after us." After five days, he regained full consciousness, and Dr. John Jane explained that he had destroyed his first and second cervical vertebrae, which meant that his skull and spine were not connected. His lungs were filling with fluid and were suctioned by entry through the throat; this was said to be the most painful part of Reeve's recovery.
After considering his situation, believing that not only would he never walk again, but that he might never move a body part again, Reeve considered suicide. He mouthed to Dana, "Maybe we should let me go." She tearfully replied, "I am only going to say this once: I will support whatever you want to do, because this is your life, and your decision. But I want you to know that I'll be with you for the long haul, no matter what. You're still you. And I love you." Reeve never considered suicide as an option again.
Reeve went through inner anguish in the ICU, particularly when he was alone during the night. His approaching operation to reattach his skull to his spine (June 1995) "was frightening to contemplate. ... I already knew that I had only a fifty-fifty chance of surviving the surgery.
Dr. John Jane performed surgery to repair Reeve's neck vertebrae. He put wires underneath both laminae and used bone from Reeve's hip to fit between the C1 and C2 vertebrae. He inserted a titanium pin and fused the wires with the vertebrae, then drilled holes in Reeve's skull and fit the wires through to secure the skull to the spinal column.
Reeve suffered from asthma and allergies since childhood. At age 16, he began to suffer from alopecia areata, a condition that causes patches of hair to fall out from an otherwise healthy head of hair. Generally he was able to comb over it and often the problem disappeared for long periods of time. Later in life, the condition became more noticeable and he shaved his head.[84]
He had experienced several illnesses, including infectious mononucleosis, malaria, and superior mesenteric artery syndrome. He also suffered from mastocytosis, a blood cell disorder.
More than once he had a severe reaction to a drug.
Reeve suffered from asthma and allergies since childhood. At age 16, he began to suffer from alopecia areata, a condition that causes patches of hair to fall out from an otherwise healthy head of hair. Generally he was able to comb over it and often the problem disappeared for long periods of time. Later in life, the condition became more noticeable and he shaved his head.
He had experienced several illnesses, including infectious mononucleosis, malaria, and superior mesenteric artery syndrome. He also suffered from mastocytosis, a blood cell disorder.
More than once he had a severe reaction to a drug. In Kessler, he tried a drug named Sygen which was theorized to help reduce damage to the spinal cord. The drug caused him to go into anaphylactic shock and his heart stopped. He believed he had an out-of-body experience and remembered saying, "I'm sorry, but I have to go now" during the event. In his autobiography, he wrote, "and then I left my body. I was up on the ceiling...I looked down and saw my body stretched out on the bed, not moving, while everybody—there were 15 or 20 people, the doctors, the EMTs, the nurses—was working on me. The noise and commotion grew quieter as though someone were gradually turning down the volume." After receiving a large dose of epinephrine, he woke up and was able to stabilize later that night.
In 2002 and 2004, Reeve fought off a number of serious infections believed to have originated from the bone marrow. He recovered from three that could have been fatal.
In early October 2004, he was being treated for a pressure wound that was causing a sepsis, a complication that he had experienced many times before. On October 9, Reeve felt well and attended his son Will's hockey game. That night, he went into cardiac arrest after receiving an antibiotic for the infection. He fell into a coma and was taken to Northern Westchester Hospital in Mount Kisco, New York. Eighteen hours later, on October 10, 2004, Reeve died of cardiac arrest at the age of 52. His doctor, John McDonald, believed that it was an adverse reaction to the antibiotic that caused his death.

A memorial service for Reeve was held at the Unitarian Church in Westport, Connecticut, which his wife attended. Reeve was cremated and his ashes were scattered.
His wife, Dana Reeve, headed the Christopher Reeve Foundation after his death. She was diagnosed with lung cancer in 2005, and died on March 6, 2006.
They are survived by their son, William, and Reeve's son Matthew and daughter Alexandra, both from his relationship with Gae Exton. Christopher is also survived by his parents and Dana is survived by her father. Matthew and Alexandra now serve on the board of directors for the Christopher and Dana Reeve Foundation.
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Friday, April 20, 2012
Charles Robert Darwin
Darwin is the first of the evolutionary biologists, the originator of the concept of natural selection. His principal works, The Origin of Species by Means of Natural Selection (1859) and The Descent of Man (1871) marked a new epoch.
Charles Robert Darwin was born at Shrewsbury. His father was a doctor and his mother was the daughter of Josiah Wedgwood. Darwin first studied medicine at Edinburgh. Will as they might, it soon became clear to the family, and particularly to young Charles, that he was not cut out for a medical career; he was transferred to Cambridge (Christ's Church, 1828), there to train for the ministry. While at Cambridge, Darwin befriended a biology professor (John Stevens Henslow, 1796-1861) and his interest in zoology and geography grew. Eventually, Darwin came under the eye of a geology professor, Adam Sedgwick (1785-1873).
Darwin gained an experience which would prove to be a substantial foundation for his life's work; the almost immediate result was the publication of his findings in 1840, Zoology of the Beagle.
In 1859, Darwin's shattering work, The Origin of Species, came out ("a sell out in one day"); it is now recognized as a leading work in natural philosophy and in the history of mankind.
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