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Free research papers and essays on topics related to: flatworms

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  • Parasitic Flatworms - 1,561 words
    Parasitic Flatworms INTRODUCTION Imagine going to the doctor for a simple check up. Sure you've had some minor problems- indigestion, lack of energy, weight loss, and a bit of gas- but that's not out of the ordinary....or is it? In most cases you would be correct...but today is your unlucky day. The doctor has just informed you that you have a tapeworm parasite. PARASITIC CHARACTERISTICS By definition, a parasite is an organism that lives either in or on another organism. Infected organisms that are carrying a parasite are called host organisms- or hosts. This parasitic relationship can vary from benign to harmful- and sometimes even fatal. There are two main types of parasites: endoparasite ...
    Related: flatworms, parasitic, life cycle, different stages, meat
  • Parasitic Flatworms - 1,538 words
    ... and in vitro. The host molecules acquired by the schistosomes were in fact surface components of the erythrocyte; A, B, H, And Lewis b+ antigens were acquired by parasitic flatworm. Even more interesting was the fact that A and B antigens could be acquired from the serum of A or B positive donors in the absence of homologous erythrocytes, irrespective of the secretor status of the donor. This provided information that the blood group substances were taken up as glycolipids rather then glycoproteins. This proof was derived from an experiment done by Goldring, Kusel and Smithers ( as cited in Parasitology 1988 ) as mentioned by D. J McLaren. Schistosomula grown in vitro with a megalolipid ...
    Related: flatworms, parasitic, clean water, immune system, immune
  • Human Disease Research - 2,297 words
    Human Disease Research Human Disease IINTRODUCTION Human Disease, in medicine, any harmful change that interferes with the normal appearance, structure, or function of the body or any of its parts. Since time immemorial, disease has played a role in the history of societies. It has affected-and been affected by-economic conditions, wars, and natural disasters. Indeed, the impact of disease can be far greater than better-known calamities. An epidemic of influenza that swept the globe in 1918 killed between 20 million and 40 million people. Within a few months, more than 500,000 Americans died-more than were killed during World War I (1914-1918), World War II (1939-1945), the Korean War (1950- ...
    Related: alzheimer's disease, disease research, heart disease, human disease, huntington's disease, infectious disease, liver disease
  • Reproduction Process - 2,027 words
    ... liography ENCYCLOPDIA BRITANNICA reproduction process by which organisms replicate themselves. In a general sense reproduction is one of the most important concepts in biology: it means making a copy, a likeness, and thereby providing for the continued existence of species. Although reproduction is often considered solely in terms of the production of offspring in animals and plants, the more general meaning has far greater significance to living organisms. To appreciate this fact, the origin of life and the evolution of organisms must be considered. One of the first characteristics of life that emerged in primeval times must have been the ability of some primitive chemical system to mak ...
    Related: reproduction, life cycle, deoxyribonucleic acid, deoxyribonucleic acid dna, formulating
  • The Digestive Systems - 1,024 words
    The Digestive Systems The digestive systems works on nutrients taken from the environment, breaking them down into simpler products, and then absorbing the products together with water and salts so they can be used in metabolism. The individuals of all species contain many different protiens or carbohydrates in the cell walls of bacteria, chitin in the external skeletons of arthropods, and so on and foreign proteins or carbohydrates are rarely incorporated unchanged. They are usually first broken down to their constituents before being built up again as the proteins or carbohydrates belonging to the organism. In such organisms that are not cellular as amoebae, digestion occurs inside the cel ...
    Related: digestive, digestive system, surface area, active life, isolated
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