Friday, March 20, 2020
poetry essays
poetry essays Everyone agrees that something must be done about the tremendous physical and emotional health problems that drug abuse causes. Concern about the abuse of drugs is so most serious problems in todays world, threatening the security and freedom of whole nations. Politicians, health experts and much of the general public feel that no issue is more important then drug abuse. Americas other pressing social problems disease, poverty, and corruption, often have a common element; that is drug abuse. The use of illegal drugs such as cocaine, crack, heroin, and marijuana cause extensive harm to the body and brain. Yet, even after knowing this many people want illegal drugs to be legalized in every aspect. The last thing we need is a policy that makes widely available span. The number of people who are addicted to illegal or are users of these drugs is quite shocking. Drug abuse is clearly an injurious and sometimes fatal problem. Not all users are addicts, but some of the users of il legal drugs in the United States are addicted. The abuse of illegal drugs is very threatening to Americas future. These drugs are the cause of many problems and crimes. Drug abuse is a serious threatening problem today and it can be brought under control with acceptable means. The use of illegal drugs such as cocaine, crack, heroin, and marijuana have been proved to cause unbelievable damage and harm to the body and brain. As well as we know, AIDS is a deadly disease which people are very frightened of today. When parents bring a child into this world, the main concern is that the child be healthy. It is an impossible deed for a drug addict female to give birth to a healthy child. Babies who are born with the AIDS virus should thank their mothers who were drug addicts and brought them into this world to pay for their own mistakes. Thousands of heroin addicts die from overdoses each ...
Wednesday, March 4, 2020
Bird Characteristics - Animals and Wildlife - About.com
Bird Characteristics - Animals and Wildlife - About.com Birds are unmatched in their command of the skies. Albatrosses glide long distances over the open sea, hummingbirds hover motionless in mid-air, and eagles swoop down to capture prey with pinpoint accuracy. But not all birds are aerobatic experts. Some species such as kiwis and penguins, lost their ability to fly long ago in favor of lifestyles suited more for land or water. Birds are vertebrates, which means that they are among those animals that possess a backbone. They range in size from the minute Cuban Bee Hummingbird (Calypte helena) to the grand Ostrich (Struthio camelus). Birds are endothermic and on average, maintain body temperatures in the range of 40Ã °C-44Ã °C (104Ã °F-111Ã °F), though this varies among species and depends on the activity level of the individual bird. Birds are the only group of animals to possess feathers. Feathers are used in flight but also provide birds with other benefits such as temperature regulation and coloration (for display and camouflage purposes). Feathers are made of a protein called keratin, a protein that is also found in mammalian hair and reptilian scales. The digestive system in birds is simple but efficient (enabling them to pass food through their system quickly to minimize the extra weight of undigested food and the time it takes to extract energy from their food). Food travels through the parts of a birds digestive system in the following order before it is excreted: esophagus - narrow tube that carries food to the crop crop - a sack-like widening of the digestive tract where food can be stored temporarily proventriculus - the first chamber of a birds stomach where food is broken down by digestive enzymes gizzard - the second chamber of a birds stomach where food is ground up by muscular action and small stones or grit (ingested by the birds) intestines - tubes that continue to extract nutrients from food after it has passed through the gizzard Refs: Attenborough, David. 1998. The Life of Birds. London: BBC Books.Sibley, David Allen. 2001. The Sibley Guide to Bird Life Behavior. New York: Alfred A. Knopf.The University of California, Berkely. 2006 (Accessed Online). Museum of Paleontology.
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