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The embryo map is a sequence of 3-D images, or slices of 3-D images, of the developing embryo which, if viewed rapidly in temporal order, forms a time-lapse view of the growing embryo. The embryogenic tree is a diagram which shows the temporal development of each of the cell lines in the embryo.
Individual cells within a morphogenetic field in an embryo are flexible: thus, cells in a cardiac field can be redirected via cell-to-cell signaling to replace damaged or missing cells. [6] The Imaginal disc in larvae is an example of a discrete morphogenetic field region of cells in an insect embryo. [7]
The theory, which can be called a reaction–diffusion theory of morphogenesis, has become a basic model in theoretical biology. [2] Such patterns have come to be known as Turing patterns. For example, it has been postulated that the protein VEGFC can form Turing patterns to govern the formation of lymphatic vessels in the zebrafish embryo. [3]
Behavioral system model, nursing theorist Dorothy E. Johnson (August 21, 1919 – February 4, 1999) [ 1 ] was an American nurse, researcher, author, and theorist. She is known for creating the behavioral system model and for being one of the founders of modern system-based nursing theory .
The embryo successively adds the organs that characterize the animal classes in the ascending scale. When the human embryo, for instance, is but a simple vesicle, it is an infusorian; when it has gained a liver, it is a mussel; with the appearance of the osseous system, it enters the class of fishes; and so forth, until it becomes a mammal and ...
The fetal origins hypothesis (differentiated from the Developmental Origins of Health and Disease hypothesis, which emphasizes environmental conditions both before and immediately after birth) proposes that the period of gestation has significant impacts on the developmental health and wellbeing outcomes for an individual ranging from infancy to adulthood.
The embryo will develop insulin resistance and enzyme levels will convert the food that is not being used into fat, which in later life can lead to obesity and diabetes. Overall the environmental mismatch hypothesis is an advantage for human development but not without some disadvantage in later life.
Ernestine Wiedenbach (August 18, 1900 in Hamburg, Germany – March 8, 1998) was a nursing theorist. Her family emigrated to New York in 1909, where she later received a B.A. from Wellesley College in 1922, an R.N. from Johns Hopkins School of Nursing in 1925, an M.A. from Teachers College, Columbia University in 1934, and a certificate in nurse-midwifery from the Maternity Center Association ...