Cell Structure

"cell structure (parts of a cell)", by Terese Winslow (Illustrator). Drawing showing a cell containing organelles, including the nucleus (contains DNA), the nucleolus, Golgi complex, mitochondria, and endoplasmic reticulum. Also shown are the cell membrane and a membrane receptor. Parts of a cell. A cell...

Concepts about cell structure have transformed significantly for many years. A cell contains three parts: the cell membrane layer, the nucleus, and, between the 2, the cytoplasm. Every cell in the body is enclosed by a cell membrane layer. The cell membrane layer separates the material outside the cell, extracellular, from the material inside the cell, intracellular. All materials within a cell need to have access to the cell membrane for the needed exchange. The cell membrane layer is a double layer of phospholipid particles. Threads of chromatin in the center include deoxyribonucleic acid, the hereditary material of the cell. The center establishes how the cell will function, along with the fundamental structure of that cell. The cytoplasm is the gel-like liquid inside the cell. Every one of the functions for cell development, development and duplication are accomplished in the cytoplasm of a cell. Within the cytoplasm, materials move by diffusion, a physical procedure that can work only for brief distances.

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