Suppose your instructor sent you an image of human epithelial cells, and he indicated the magnification to equal 1300 X. What would be the cell's actual size under high power, knowing that the cell measured ten subdivisions of the microscope graticule? Please indicate the unit beside the number. Answer:

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Environmental health and hazards

An organism's environment is the environment in which it lives and has an impact on its well-being. The World Health Organization (WHO) defines environmental health as "those aspects of public health, such as quality of life, that are influenced by physical, chemical, biological, social, and psychosocial components in the environment." Environmental health is concerned with both natural and man-made settings in order to enhance public health. Environmental science, occupational medicine, toxicology, and epidemiology are the key subdisciplines of environmental health.