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The use of fetal tissue in vaccine development is the practice of researching, developing, and producing vaccines through growing viruses in cultured (laboratory-grown) cells that were originally derived from human fetal tissue. [ 1] Since the cell strains in use originate from abortions, [ 2] there has been opposition to the practice and the ...
e. Human embryonic development or human embryogenesis is the development and formation of the human embryo. It is characterised by the processes of cell division and cellular differentiation of the embryo that occurs during the early stages of development. In biological terms, the development of the human body entails growth from a one-celled ...
H&E stain. Products of conception, abbreviated POC, is a medical term used for the tissue derived from the union of an egg and a sperm. It encompasses anembryonic gestation (blighted ovum) which does not have a viable embryo . In the context of tissue from a dilation and curettage, the presence of POC essentially excludes an ectopic pregnancy .
A fetus or foetus ( / ˈfiːtəs /; pl.: fetuses, foetuses, rarely feti or foeti) is the unborn offspring that develops from a mammal embryo. [ 1] Following embryonic development, the fetal stage of development takes place.
The list of human cell types provides an enumeration and description of the various specialized cells found within the human body, highlighting their distinct functions, characteristics, and contributions to overall physiological processes. Cells may be classified [ 1] by their physiological function, histology (microscopic anatomy), [ 2 ...
In vitro and in response to specific cocktails of hormones (mainly auxins and cytokinins), most plant tissues can de-differentiate and form a mass of dividing totipotent stem cells called a callus. Organogenesis can then occur from those cells. The type of organ that is formed depends on the relative concentrations of the hormones in the medium.
Embryonic stem cells ( ESCs) are pluripotent stem cells derived from the inner cell mass of a blastocyst, an early-stage pre- implantation embryo. [ 1 ][ 2 ] Human embryos reach the blastocyst stage 4–5 days post fertilization, at which time they consist of 50–150 cells. Isolating the inner cell mass (embryoblast) using immunosurgery ...
An informational pamphlet for Arizona voters, who will decide in the fall whether to guarantee a constitutional right to an abortion, can refer to an embryo or fetus as an “unborn human being ...