Purpose The digestive system prepares food for use by hundreds of millions of body cells. Food when eaten cannot reach cells (because it cannot pass through the intestinal walls to the bloodstream and‚ if it could would not be in a useful chemical state. The gut modifies food physically and chemically and disposes of unusable waste. Physical and chemical modification (digestion) depends on exocrine and endocrine secretions and controlled movement of food through the digestive tract. Mouth Mouth
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progression. Damage is most severe in the duodenum‚ most likely due to longer exposure to gluten during digestion. The result is flattening and destruction of microvilli‚ increased density and hypertrophied crypts by infiltration of lymphocytes in the epithelium of mucosa” (Rivera
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Respiration. *The respiratory system consists of tubes that filter incoming air and transport it into the microscopic alveoli where gases are exchanged the entire process of exchanging gases between the atmosphere and body cells is called respiration and consists of the following: ventilation‚ gas exchange between blood and lungs‚ gas transport in the bloodstream‚ gas exchange between the blood and body cells‚ and cellular respiration *The organs of the respiratory tract can be divided into two
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ESSAY ‘The structure and importance of the plasma membrane found within and around all cells’ The plasma membrane surrounds all eukaryotic and prokaryotic cells. Eukaryotic cells have membrane bounded organelles whereas prokaryotic cells do not. The plasma membrane forms the boundary between the cell cytoplasm and the environment. Its function are to allow different environments to be established inside and outside the cell. It also controls the movement of substances into and out of the cell.
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Title: Homeostasis Date: 19th January 2010 Aim: To observe‚ draw and label the parts of a nephron. Apparatus: Slide of the transverse section of a kidney Pencil Paper Microscope Method: The slide of the transverse section of a kidney was mounted on the microscope and observed under high power. Drawings of the parts of the nephron were made. Calculations of Magnification: Loop of Henle One Ocular Division = 0.22 µm Size of Specimen = 2 ocular divisions Conversion of Ocular
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Symposis of General Embryology Professor Adel K.AbdelMalek MbChB‚MsC‚MMed‚Ph.D 2013 CONTENTS 1 Intoduction 1 2 Gametogenesis 5 Spermatogenesis 6 Oogenesis 9 3 Female reproductive cycles 12 Ovarian cycle 12 Menstrual cycle 15 4 Fertilization 18 Contraceptive methods 20 Infertility 21 Cloning 23 5 Early embryonic
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Whooping Cough Mark Near (Article from the Fresno Bee‚ September 16th‚ 2010) Every year or season a slightly different flu strain awakens‚ infecting our human population. This fall it’s the whooping cough‚ also called pertussis. It is causing many deaths‚ especially in infants. Many health officials have grown concerned with this unexpected new threat‚ mainly because the babies are too young to be fully immunized by the illness. It’s essential to understand how this virus is effecting our
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A pressure ulcer is caused by external pressure being applied to prominent bony surfaces of the body such as the elbows‚ spine‚ heels‚ ankles‚ and in your husbands‚ case the coccyx. The ulcer formed when the capillary pressure within the tissue was exceeded‚ interrupting his circulation‚ and causing his tissue to go without oxygen which caused damage and tissue death (Anders‚ J. et al.‚ 2010). In the case of your husband‚ a decubitus ulcer formed which was caused by his lying or sitting for an
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respiratory organ Internal Respiration Exchange of gas between blood and the tissue cells 1. 2. 3. - Adequate Respiratory Apparatus Large surface area For contact between the environmental medium (water or air) and the blood Thin and Moist Epithelium Barrier Between medium and blood High Vascularized Many blood vessels Ventilation - Pumping of water in - Pumping of air in lungs Respiratory Devices Adaptations for External Respiration: Primary Organs in Adult Vertebrates are: External and
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Naegleria fowleri The Brain Eating Amoeba Microbiology 204-002 May 4‚ 2010 Microorganisms surround us by the trillions and though few are pathogenic‚ those that are can adversely affect anyone who comes in contact them‚ sometimes to the point of death. Few deaths are as terrifying as the one endured when the parasitic amoeba known as _Naegleria fowleri_ finds its way inside your body and into your brain to feast and multiply. Discovered in Australia in the 1960s‚ _N. fowleri_ has been
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