A cell is the basic unit of a living organism. The organization of human body include multiple number of cells make tissue, a number of tissues form organs, multiple number of organ form a organ system.
In eukaryotic cell, Cellular Level Organisation include different types of cell organelles like mitochondria, chloroplast, endoplasmic reticulum, Golgi apparatus, lysosomes, ribosomes, nucleus, etc.
The organisms with single cell called unicellular organisms and multiple cell called multicellular organism like Human beings
Tissue Level Organization include a group of cells perform a specific functions and the level of organization is tissue level which is more complex.
Organ Level Organization include a number of gathered to form specific organs to do specific function, like stomach, heart, lungs etc.
Organ System Level Organization include a number of organs coordinate together to do specific function such as digestion, excretion, circulation, reproduction etc.,
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