Cell specialisation and organisation

Tissues:

A collection of similar cells that perform a specific function

Examples include:

Epithelial cells -

• Found in animals
• Consist of sheets of cells
• Line surfaces of organs and often have a protective or secretory function
• Alveoli in lungs - where diffusion takes place
• Ciliated epithelium - lines a duct such as the trachea
• Cilia are used to move mucus over the epithelial surface

Xylem -

• Occurs in plants
• Made up of a number of similar cell types
• Used to transport water and mineral ions throughout the plant
• Gives it mechanical support

Organs:

Combination of tissues that are coordinated to perform a variety of functions, although they often have one predominant major function.

Stomach -

• Muscle to churn…