In multicellular organisms, similar cells form tissues, tissues combine to form organs organs work together as organ systems and organ systems form an organism. This hierarchical organisation ensures proper coordination, efficient functioning and successful performance of complex life activities.
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Multicellular organisms have a hierarchical organisation where cells form tissues, tissues form organs, organs form organ systems and organ systems together form the complete organism. Each level performs specialised functions while coordinating with other levels. This arrangement creates division of labour, increases efficiency and allows organisms to carry out complicated processes like digestion, movement, respiration and reproduction smoothly.
For more NCERT Solutions of Class 9 Science Exploration Chapter 3 Tissues in Action Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-3/