ROD CELLS Rod cells‚ or rods‚ are photoreceptor cells in the retina of the eye that can function in less intense light than the other type of visual photoreceptor‚ cone cells. Rods are concentrated at the outer edges of the retina and are used in peripheral vision. On average‚ there are approximately 125 million rod cells in the human retina.[1] More sensitive than cone cells‚ rod cells are almost entirely responsible for night vision. STRUCTURE AND FUNCTION Rods are a little longer and leaner
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A REPORT ON HEART DISEASE Contents ACKNOWLDGEMENT 3 METHODOLOGY 4 INTRODUCTION 5 Heart 5 Heart Disease 5 CAUSES (RISK FACTORS) 7 Uncontrollable Causes: 7 Controllable Causes 8 EFFECTS 13 PREVENTIVE MEASURES 16 SOME DATAS AND FACTS ABOUT HEART DISEASE 20 CONCLUSION 22 REFERENCES 22 ACKNOWLDGEMENT It is a great pleasure for me to express gratitude to the people who have been influential and supportive in the successful completion of this assignment. First and foremost‚ I would
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Equine Diseases I have had pretty much every “farm animal” except a horse. I’ve always liked riding my uncles house and I think it would be nice to understand some of the different terms and diseases in horses. They are different from the hogs and cattle we’ve had and they seem like they need more care to stay healthy. I always hear different terms that I’m not exactly sure what they mean. One of them is “cribbing”. This is a fairly common issue in horses that are kept in a smaller area. It’s
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Cell injury In this topic we are going to cover Cell injury Causes of cell injury Mechanism of cell injury Morphologic alterations in cell injury Morphologic types of necrosis Objectives Describe cell injury List the causes of cell injury Discuss how depletion of ATP causes cell injury Describe how mitochondrial damage cause cell injury Explain the mechanism of cell injury by free radicals Discuss how calcium ion influx cause cell injury Cell injury cell injury results when cells
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Addison’s Disease Instructor: September 10th‚ 02014 Addison’s disease is a disorder of the adrenal glands. It is also known as hypocortisolism or adrenal insufficiency. The disease occurs when your adrenal glands do not produce sufficient amounts of certain hormones. The adrenal glands do not produce enough cortisol and more often than not‚ insufficient amounts of aldosterone. Autoimmune disease can be attributed to approximately 70 percent of the cause for Addison’s disease. The autoimmune
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January 2015 The causes of disease in humans A disease is defined as a disorder of structure or function in a human‚ animal‚ or plant‚ especially one that produces specific symptoms or that affects a specific location and is not simply a direct result of physical injury. In this essay I will explore the causes of disease in humans‚ in terms of pathogen infection‚ viruses‚ lifestyle factors and genetics. Infectious diseases are caused by pathogens; any organism that causes disease. Pathogenic microorganisms
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CELL INJURY: CAUSES OF CELL INJURY‚ MECHANISMS OF REVERSIBLE AND IRREVERSIBLE CELL INJURY. CELL INJURY. Causes of cell injury range from gross mechanical external causes to mild endogenous causes as genetic lack of enzymes etc. Virtually all forms of tissue injuries start with molecular or structural alterations in cells. Under normal conditions‚ the cells are in: ❖ homeostastatic „steady“ state Normal cell is confined to relatively narrow range of functions and structure by
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Artif Biology Project – Do You Agree With the Creation of This Artificial Cell? Introduction The aim for this project is to find out the positive and negative impacts of the creation of a new artificial cell called Cinthya (Annex N.1)‚ how can it be used positively in different fields‚ and at last‚ if I personally agree with the creation of Artificial Cells. In this project I will inform you about the uses of Artificial Cells in medicine and other subjects‚ if there are any drawbacks and finally
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Seeding cells into needled felt scaffolds for tissue engineering applications SUMMARY: Tissue engineering methods are under development that will enable the repair or replacement of a variety of tissues‚ including articular cartilage and bone. To engineer functional tissue it is necessary that scaffolds initially be seeded with a large number of cells distributed evenly throughout the scaffold structure. It previously has been shown that‚ compared to static seeding conditions‚ seeding scaffolds
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Chronic Kidney Disease BIO 105‚ sec M02 Prof. Palanca Ayo Powell (Term Paper) 3/25/12 The Kidney is one of the most important organs in the human body. Its primary function is the removal of waste & toxins from the blood stream. So if the kidney stopped working correctly and is no longer able to properly function that would lead to serious problems. Blood is no longer being cleaned. The waste and the toxins aren’t being removed. Instead it’s all building up in the blood stream causing
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