Cell theory explains the fundamental principles of cells and their origin, organelles play vital roles within cells, and the plasma membrane regulates the flow of materials in and out of the nucleus.
Cell Theory: Cell theory states that all living organisms are composed of cells, cells are the basic units of structure and function in living organisms, and all cells come from pre-existing cells through division. The theory was formulated by Schleiden, Schwann, and Virchow.
Organelles: Organelles are specialized structures within cells that perform specific functions. Three important organelles are mitochondria (produce energy), nucleus (control center), and lysosomes (break down waste).
Plasma membrane: The nuclear membrane surrounds the nucleus of a cell, separating it from the cytoplasm and controlling the passage of materials in and out of the nucleus.
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