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The unit described as the secondary pulmonary lobule is the lobule most referred to as the pulmonary lobule or respiratory lobule. [27]: 489 [33] This lobule is a discrete unit that is the smallest component of the lung that can be seen without aid. [31] The secondary pulmonary lobule is likely to be made up of between 30 and 50 primary lobules ...
v. t. e. Cell biology (also cellular biology or cytology) is a branch of biology that studies the structure, function, and behavior of cells. [ 1][ 2] All living organisms are made of cells. A cell is the basic unit of life that is responsible for the living and functioning of organisms. [ 3] Cell biology is the study of the structural and ...
Development of the human body is the process of growth to maturity. The process begins with fertilization, where an egg released from the ovary of a female is penetrated by a sperm cell from a male. The resulting zygote develops through mitosis and cell differentiation, and the resulting embryo then implants in the uterus, where the embryo ...
Here’s the deal: For years, there’s been a popular theory in behavioral science research that people hit a kind of “happiness plateau” around the $75,000 a year threshold (or around ...
v. t. e. Anatomy (from Ancient Greek ἀνατομή (anatomḗ) ' dissection ') is the branch of morphology concerned with the study of the internal structure of organisms and their parts. [ 1] Anatomy is a branch of natural science that deals with the structural organization of living things. It is an old science, having its beginnings in ...
The Human Development Report includes data for all 193 member states of the United Nations, [ 16] as well as Hong Kong SAR and the State of Palestine. However, the Human Development Index is not calculated for two UN member states: DPR Korea (North Korea) and Monaco, only some components of the index are calculated for these two countries.
Pollution is the introduction of contaminants into the natural environment that cause adverse change. [ 1] Pollution can take the form of any substance (solid, liquid, or gas) or energy (such as radioactivity, heat, sound, or light). Pollutants, the components of pollution, can be either foreign substances/energies or naturally occurring ...
Society portal. v. t. e. Human impact on the environment (or anthropogenic environmental impact) refers to changes to biophysical environments [ 1] and to ecosystems, biodiversity, and natural resources [ 2] caused directly or indirectly by humans. Modifying the environment to fit the needs of society (as in the built environment) is causing ...