Human Biology Essays, Research Papers & Term Papers (418) essays
Human Biology essays:
Cancer
... of all deaths.[2] According to the American Cancer Society, 7.6 million people died from cancer in the world during 2007.[3] Apart from humans, forms of cancer may affect other animals and plants. Nearly all cancers are caused by abnormalities in the genetic material of the transformed cells ...
Coronary Heart Disease
... heart. The coronary arteries narrow, due to the build up fatty deposits, called artheramas. These reduce the blood supply to the heart and sometimes block it completely. The result can be minor chest pains, but could also result in a fatal heart attack. This is known as Coronary heart disease ...
A report on Caffeine and it's harmful effects to the body.
... and seeds of many plants. Also produced artificially, caffeine, at times, added to certain foods. Caffeine is part of the same group of drugs sometimes used to treat asthma. Caffeine can be found in tealeaves, coffee beans, chocolate, numerous soft drinks, pain relievers, and ...
Circulatory System
... of different size and wall thickness. In this type of system, blood is pumped by a heart through vessels, and does not normally fill body cavities. Hemoglobin causes vertebrate blood to turn red in the presence of oxygen; but more importantly hemoglobin molecules in blood cells ...
Biology AT1 on the affect of hydogen peroxide on the liver
... react with cell walls and damage them or break them down. The variables that affect the decomposition of hydrogen peroxide are: 1. The temperature of the liver 2. The surface area of the liver 3. The pH of the hydrogen peroxide 4. The concentration of the enzymes ...
The Results Of Aging
... American microbiologist Leonard Hayflick. He found that certain human cells could only divide a limited number of times before they die. This may suggest that aging is 'programmed' into cells. This could also account for the differences in the life spans of different animal species, and ...
HIV: Detailing the Human Immunodeficiency Virus
... genetic material of the host cell. Once HIV DNA is integrated into the helper T cell's genome, the instructions for HIV proteins are now part of the genetic information of the cell, therefore, if the cell divides, the viral DNA will be replicated with it. The integrated viral DNA ...
Research paper on stroke
... genetic predisposition for some of the risk factors. Race is also important in determining those at risk. African Americans have almost double the risk compared to Caucasians. High blood pressure is one of the leading causes of stroke. As many as 50 million Americans have high blood pressure and ...
Explain how homopoiesis occurs and how it results in mature red blood cells.
... soft network of reticular connective tissue that borders on wide blood capillaries called sinusoids. In this network are immature blood cells, macrophages, fat cells, and reticular cells (the fibroblasts that secrete the fibers). Each type of blood cell ...
Child development is often separated into 3 or 4 'developmental pathways'. Examine the inter-relationship of these pathways.
... of physical activity at home in Mexican-American and Anglo-American preschool children. Taylor, W.C., (1993). The influence of physical activity in childhood and ...