Cell theory, developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann, states that all organisms are composed of one or more cells, that cells are the fundamental unit of structure and function in all organisms, and that all cells come from pre-existing cells. Organisms are broadly grouped into eukaryotes and prokaryotes.
Cells consist of a variety of internal and external structures that perform specialized functions necessary for survival and reproduction. These components vary depending on whether the cell is prokaryotic or eukaryotic, and whether it belongs to a plant, animal, fungus, or protist.
Human cells contain the following major parts, listed in alphabetical order: Within cells, the cytoplasm is made up of a jelly-like fluid (called the cytosol) and other structures that surround the nucleus. The cytoskeleton is a network of long fibers that make up the cell’s structural framework.
Cells are the basic units of life. The body contains trillions of cells, which vary widely in size, number, structure, and function. Cells also communicate with each other. Whether in plants,...
Medical Xpress on MSN: Loss of microbiota alters the profile of cells that protect the intestinal wall, experiments reveal
Loss of microbiota alters the profile of cells that protect the intestinal wall, experiments reveal
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