CBH 18 Animal tissue

• Tissue


  An aggregate of cells and extracellular matrix derived from them that perform a specific function
• Types of tissue

  Epithelial tissue , connective tissue , muscle tissue , nerve tissue
• Epithelial tissue


  Covers body surface, lines hollow organs, body cavities and ducts , while also forming glands

  
• Connective tissue


  Protects and supports the body and its organs, binds organs together, store energy reserves as fat, and provides immunity
• Muscle tissue


  Responsible for movement and generation of force
• Nerve tissue


  Initiates action potentials(nerve impulses) that help coordinate body activities
• Origin of tissue

  Ectoderm: epidermis and nervous system Endoderm: digestive tubes, pancreas, liver and lung Mesoderm: connective and muscular tissues