MULTICELLULAR ORGANISM Meaning and
Definition
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A multicellular organism is a complex living entity composed of multiple cells working together in a coordinated manner. It represents a higher level of organization and sophistication compared to single-celled organisms. These organisms can be found in all domains of life, including plants, animals, and fungi.
The defining characteristic of multicellular organisms is the presence of multiple specialized cells that are organized into different tissues and organs. These cells are structurally and functionally differentiated, enabling the organism to perform a wide range of functions necessary for survival, growth, and reproduction.
The cells within a multicellular organism communicate with each other through various signaling mechanisms to ensure proper coordination and response to internal and external stimuli. This communication enables them to work together harmoniously, allowing the organism to carry out complex processes such as metabolism, respiration, digestion, reproduction, and locomotion.
Multicellular organisms exhibit a high degree of cellular specialization and division of labor, with different cells performing specific functions within the organism. Cell types can vary greatly across multicellular organisms, ranging from nerve cells for communication and coordination to muscle cells for movement, and from xylem cells for water transport in plants to blood cells for oxygen transport in animals.
Overall, the emergence of multicellular organisms revolutionized life on Earth, leading to the development of diverse and complex life forms that dominate the planet today.
Etymology of MULTICELLULAR ORGANISM
The word "multicellular" has Latin roots. The term "multi-" comes from the Latin word "multus", meaning many, and "-cellular" comes from the Latin word "cellula", meaning small room or compartment. The term "organism" comes from the Latin word "organismus", which is derived from the Greek word "organon", meaning instrument or tool. Therefore, "multicellular organism" is a compound term combining "multi-" (many), "cellular" (small room or compartment), and "organism" (instrument or tool), indicating an organism composed of multiple cells.
