To understand Castleman disease, it helps to know about the bodyâs lymph system. Lymphoid tissue, also known as lymphatic tissue, is the main part of the immune system. It is formed by different types of cells that work together to help the body fight infections.
Observation Systems International Program. Demography, the science of human population (or more specifically, the study of population structure. and processes), draws together research from a number of disciplines, including economics, sociology, geography, public health, and genetics. In addition to the environmental impacts of.
Demography is the study of these changes. Ecologists use demographic analysis to predict the growth of a population. Birth rate, death rate, immigration and emigration can be used to determine the growth rate of the population in a given period of time. This data can also be used to develop plans to protect endangered species. Survivorship Curves