Biology teacher

  Cell Theory Explained: Schleiden, Schwann and Virchow Notes for NEET Cell Theory and Overview of Cell showing plant cell, animal cell, nucleus, cytoplasm and membrane-bound organelles. Cell Theory & Overview of Cell (NEET Notes for Beginners) 1. Development of Cell Theory 🧑‍🔬 Matthias Schleiden (1838) German botanist. Studied plant tissues. Concluded that all plants are made up of cells . 🧑‍🔬 Theodor Schwann (1839) German zoologist. Studied animal cells. Observed a thin outer boundary in animal cells, now called the plasma membrane (cell membrane) . Found that cell wall is present only in plant cells . Concluded that animals and plants are composed of cells and cell products . 📖 Cell Theory by Schleiden and Schwann They proposed that: All living organisms are made up of cells. Cells are the basic structural units of life. 🧑‍🔬 Rudolf Virchow (1855) Explained how new cells are formed. Proposed: "Omnis Cellula e Cellula" → All cells arise...

  Cell Theory and Overview of Cell – Easy NEET Notes (Line by Line) Schwann’s Contribution (1839) Theodor Schwann (1839) was a German zoologist . He studied different types of animal cells . He observed that animal cells have a thin outer covering . This outer covering is now called the plasma membrane (cell membrane) . Schwann also studied plant tissues . He found that plant cells possess a cell wall outside the plasma membrane. He concluded that the cell wall is a unique feature of plant cells . Based on his observations, Schwann proposed that: Plants and animals are made up of cells. Cells and their products form the body of organisms. NEET Point ✅ Schwann discovered the importance of the plasma membrane and recognized the cell wall as a characteristic feature of plant cells . Formation of Cell Theory Matthias Schleiden studied plant cells. Theodor Schwann studied animal cells. Together, Schleiden and Schwann formulated the Cell Theory . Main Idea ...

  Cell: The Unit of Life – Easy NEET Notes for Beginners  - Dr.Sanjaykumar pawar Introduction: Living and Non-Living Things Line: When you look around, you see both living and non-living things. Easy Note: Everything around us can be divided into: Living things → humans, plants, animals, bacteria. Non-living things → stone, table, water, air. Line: You must have wondered and asked yourself – what makes an organism living? Easy Note: Scientists wanted to know what special feature is present in living organisms. The answer is cell . NEET Point: ✅ Cell is the basic unit that differentiates living organisms from non-living objects. Line: The answer to this is the presence of the basic unit of life – the cell in all living organisms. Easy Note: Every living organism is made up of one or more cells. Cells perform all life activities. NEET Important: ⭐ Cell = Basic Unit of Life All Organisms are Composed of Cells Line: All organisms are composed o...

  Unit 3 – Cell: Structure and Functions  - Dr.Sanjaykumar Pawar  Easy Line-by-Line Notes (NEET Level for Beginners) 1. “Biology is the study of living organisms.” Biology = science of life. It studies plants, animals, microbes, and humans. 2. “The detailed description of their form and appearance only brought out their diversity.” Living organisms look different from each other. Example: bacteria, plants, and humans all have different shapes and sizes. 3. “Cell theory emphasised the unity underlying this diversity of forms.” Even though organisms look different, all are made of cells. This common feature is explained by Cell Theory . 4. “The cellular organisation of all life forms.” Every living organism is made of one or more cells. Cell = basic structural and functional unit of life. 5. “A description of cell structure and cell growth by division...” Cells have different parts called organelles. Cells grow and reproduce by cell division. ...