{ "item_title" : "Cell Biology", "item_author" : [" D. Maria "], "item_description" : "Cell biology is one of the most fundamental branches of biological science that deals with the study of cells, their structure, functions, chemical composition, and life processes. The cell is recognized as the basic structural, functional, and biological unit of life. Every living organism, from the simplest unicellular microorganisms to complex multicellular plants and animals, is composed of one or more cells. Understanding cell biology is therefore essential for exploring the organization, development, functioning, and survival of living organisms.The history of cell biology began with the development of the microscope, which enabled scientists to observe structures that were previously invisible to the naked eye. In 1665, Robert Hooke observed small, box-like compartments in a thin slice of cork and introduced the term cell. Later, Antonie van Leeuwenhoek observed living cells and microorganisms using improved microscopes. During the nineteenth century, Matthias Schleiden and Theodor Schwann proposed the cell theory, establishing that all plants and animals are composed of cells. Rudolf Virchow subsequently emphasized that new cells arise from pre-existing cells. These discoveries laid the foundation for modern cell biology.Cells exhibit remarkable diversity in their size, shape, structure, and function. Based on their organization, cells are broadly classified into two major categories: prokaryotic and eukaryotic cells. Prokaryotic cells, found in bacteria and archaea, generally lack a membrane-bound nucleus and other membrane-bound organelles. Eukaryotic cells, present in plants, animals, fungi, and protists, contain a well-defined nucleus and specialized organelles. Each type of cell possesses distinct structural characteristics that enable it to perform essential biological activities.The major components of a typical eukaryotic cell include the plasma membrane, cytoplasm, nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, ribosomes, lysosomes, and cytoskeleton. Plant cells also possess characteristic structures such as a cellulose cell wall, chloroplasts, and a large central vacuole. These cellular components work together in a coordinated manner to maintain cellular organization and support life. The plasma membrane regulates the movement of substances into and out of the cell, the nucleus stores genetic information, mitochondria generate much of the cell's usable energy, and ribosomes synthesize proteins.Cell biology also investigates the essential processes that sustain life, including cellular respiration, photosynthesis, protein synthesis, membrane transport, intracellular communication, cell division, and programmed cell death. The regulation of these processes ensures that cells grow, reproduce, respond to environmental changes, and maintain internal stability. Cell signaling and gene regulation further explain how cells coordinate their activities and develop specialized functions within multicellular organisms.This book, Cell Biology, aims to provide a systematic understanding of the fundamental principles governing cellular structure, organization, and function. It introduces the historical development of cell theory, explores the structural and functional characteristics of cellular components, and examines the molecular mechanisms responsible for essential life processes. It also highlights the importance of cell division, cellular communication, genetic regulation, and cell death in maintaining biological systems.", "item_img_path" : "https://covers2.booksamillion.com/covers/bam/9/79/816/503/9798165032349_b.jpg", "price_data" : { "retail_price" : "8.00", "online_price" : "8.00", "our_price" : "8.00", "club_price" : "8.00", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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