Tiny organisms are too small for the human eye to detect without help. Before magnifying tools like microscopes were invented, people didn’t know these organisms existed, as they are beyond normal visual range. Class 8 Science Curiosity Chapter 2 The Invisible ...
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The levels of organisation in a living body are: Cell → Tissue → Organ → Organ System → Organism. Each level builds on the previous, enabling complex bodily functions through cooperation among specialized parts. Class 8 Science Curiosity Grade 8 Chapter ...
Cells perform tasks like producing energy, transporting materials and repairing tissues. Different cells join to form tissues and organs, helping the body move, think, digest and stay alive. Class 8 Science Curiosity Grade 8 Chapter 2 The Invisible Living World Beyond ...
Yes, a cell’s shape and structure relate directly to its function. For example, red blood cells are disc-shaped to carry oxygen easily, while nerve cells are long to transmit messages over distances. Class 8 Science Curiosity Textbook Chapter 2 The Invisible ...
Cells look different because they perform different roles. Their shape, size and internal structures adapt to their function—like movement, protection or signal transmission—making each type specialized for a task. Class 8 Science Curiosity Textbook Chapter 2 The Invisible Living World – ...