... contraction into the aorta. Branching the aorta divides into a number of main branches, which in turn divide into smaller ones until the entire body is supplied by series of blood vessels. Portal circulation in addition to the pulmonary and systematic circulations described above, a subsidery to the venous system exists, known as portal circulation. A certain amount of blood from the intestine is collected into the portal vein and carried to the liver. Coronary circulation is the means by which the heart tissues themselves are supplied with nutrients and oxygen and are freed of wastes. Just beyond the semiluna valves, two coronary arteries branch from the ...

... psychological explanation, REM dreaming enhances memory storage and reorganization. Contrary to popular belief, dreaming is not caused by eating certain foods before bedtime, nor by environmental stimuli during sleeping. Dreaming is caused by internal biological process. Some researchers have proposed the activation-synthesis hypothesis. Their neurological research indicates that large brain cells in the primitive brain stem spontaneously fire about every 90 minutes, sending random stimuli to cortical areas of the BRAIN. As a consequence, memory, sensory, muscle-control, and cognitive areas of the brain are randomly stimulated, resulting in the higher co ...

... that over twenty percent of the adults currently carry the virus. was first seen as a disease of gay males in this country. This was a result of the fact that gay males in this culture in the days before had an average of 200 to 400 new sexual contacts per year. This figure was much higher than common practice among heterosexual men or women. In addition, it turned out that rectal sex was a particularly effective way to transmit the disease, and rectal sex is a common practice among gay males. For these reasons, the disease spread in the gay male population of this country immensely more quickly than in other populations. It became to be thought of as a "ga ...

... The third night of this routine, a terrible thought occurred to me. If Jack were a dog, I thought, what would be done to him? The answer was obvious: the pound, and the chloroform. No human being with a spark of pity could let a living thing suffer so, to no good end"( Rachels 13). The experience of Stewart Alsop, a respected journalist, with his terminally ill friend Jack, forces us to ask why a dying dog is entitled to more humane treatment than a human in the same condition. Finding a humane and sensible approach to treating the terminally ill has become a hotly debated topic in recent years. One approach to this problem is euthanasia, which by definition mean ...

... drug!”2 An athlete will usually get out of a sport what he or she puts into it. If one would push themselves real hard and fail, they could end up with some problems. They could drive so hard as to cause or worsen injuries. They might ignore school, friends, family or work just to train on winning. They develop an aggressive training style which would lead to drugs such as steroids.3 “There are many reasons why people use steroids. But the two main ones are to excel in athletic competition and to look more like one’s ideal of a perfect body.”4 Many athletes are representing their school, state, or territory they come from at the competitions they are involve ...

... allergies, athletic ability, and even diabetes can exist in one of the personalities and not the others. The person can switch at any given time from one personality to another, often not realizing it. This can account for memory loss and time loss in the primary personality, who often does not have access to the memories of the other personalities. A common misconception among the general public is the confusion of MPD with the disease of schizophrenia. Schizophrenics do NOT have distinct personalities, rather, they have hallucinations of voices outside their heads. Schizophrenia is caused by brain malfunctions and can be treated with drugs, whereas ...

... upset, frighten or discourage him. The facts should be quietly laid before him in an optimistic way so that he may achieve a sensible adapta- tion. Two hundred and ninety-nine of three hundred pa- tients who were asked if they felt they should he told by their doctor when he was sure of the diagnosis replied "Yes". It is quite obvious that you cannot learn to adapt and handle all the problems connected with an illness such as this unless you know what it is. It may sometimes be diffi- cult to decide what to tell the neighbors and visitors who come regularly to the house as well as servants and others around the patient and family. It is, nevertheless, our opinio ...

... namely, Hepatitis A, B, C, D, E, and G. Hepatitis descries the destructive affect of the viral invasion of the body and liver by six and separate viruses. Each type of viral infection varies from one to another in degree of severity. The names of the viruses are in alphabetical order corresponding to their discovery. There is also a non-viral Hepatitis which is caused by substance. One rumor that has spread about hepatitis is that a person can only contract Hepatitis if associated with HIV or AIDS. This is not true! Any one can become infected with Hepatitis. Unfortunately this is about all most people know of Hepatitis. They need to know the ful ...

... bones and muscles, contributes to the growth of skin and hair and can also influence emotions. Anabolic Steroids, also known as "juice", are a synthetic version of the hormone testosterone. When taken, either orally or injected, these synthetic steroids fool the body into thinking that testosterone is being produced and therefore the body shuts down functions involving testosterone (Mishra 2). Given the right training stimulus and diet, these steroids enables the user to process protein into muscle fibers at astonishing rates, creating increased muscle size and strength with a drop in body fat (due to an increase in metabolic rate) . They are, in effect, the chemi ...

... analogy above, and seeming harmless to the unaware user, steroids can have a potentially jeopardous effect. Consistently, users, new and experienced, have no knowledge to the dangerous consequences' steroids can have on their minds and bodies. Although steroids cause minimal deaths in our society, banning of steroids is purely justified because steroids have extremely perilous side effects on the unsuspecting user. Though steroids are known as a somewhat dangerous substance, they are legal to possess and consume, and there has not been a true clinical study that proves such possible side effects are linked to medical problems of steroid users. Sure, there has been ...