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surface area

the extent of a 2-dimensional surface enclosed within a boundary


the amount of space an object takes up


the act of dispersing or diffusing something


a threadlike body in the cell nucleus that carries the genes in a linear order


the readily stainable substance of a cell nucleus consisting of DNA and RNA and various proteins


a part of an organism consisting of an aggregate of cells having a similar structure and function


several types of body tissues that together form a function

organ systems

a group of organs that work together in performing vital body functions

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