THE FUNDAMENTAL UNIT OF LIFE in 1 Shot | FULL Chapter Coverage (THEORY+PYQs) | Class-9th Biology
Physics Wallah Foundation・2 minutes read
All living organisms have bodies made up of cells, which are the fundamental unit of life and were discovered by Robert Hook in 1665. Different organs in the human body are composed of tissues made up of cells, and understanding the structure and function of cells is essential for comprehending the workings of different organs and organ systems.
Insights
- Cells, discovered by Robert Hook in 1665, are the fundamental unit of life and form the basis of all living organisms, including humans, by composing tissues that make up organs and organ systems.
- The understanding of cell structure, including the nucleus, plasma membrane, and cytoplasm, is crucial for comprehending the functions of different organs and organ systems in the body.
- The plasma membrane, a living and flexible structure composed of lipids and proteins, controls the entry and exit of substances into the cell through selective permeability, with active transport requiring energy and passive transport not.
- Different types of cells, such as nerve cells and muscle cells, exhibit unique shapes and sizes, with variations in size and shape across bacteria, plant, and animal cells, emphasizing the diversity of cellular structures and functions.
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Cells
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