Cell Organisation


Large Multicellular Organisms are made up of organ

1. Cells are the basic building blocks of life, that make up all living organisms. 

2.  Specialised cells carry out a particular function. 

3. The process by which cells become specialised for a particular job is called differentiation. Differentiation occurs during the developement of a multicellular organism. 

4. These specialised cells form tissues, which form organs, which form organ systems. 

5. Large multicellular organisms have different systems inside them for exchange and transporting materials. 

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Similar cells are organised into the Tissues

In mamals (like humans), examples of tissues include; 

- Muscular tissues, contract (shortens) to move whatever it's attached to. 

- Gladular tissue, makes and secretes chemicals like enzymes and hormones. 

- Epthilial tissue, which covers some parts of the body. 

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Tissues are Organised into organs

For example, the stomach is an organ made of these tissues:

- Muscular tissue, which moves the stomach wall to churn up food. 

- Gladular tissue, which makes digestive juices to digest food. 

- Epithelial tissue, which covers the outside and inside of the stomach. 

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