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Tissues, Apial, Lateral, Intercalary, Very active, Thin cellulose walls,…

- - - - Lining blood vessels/lung alveoli
        
        Semi-permeable membrane
    - - Kidney tubulets, ducts of salivary glands
        
        Mechanical support
    - - Absorbtion, secretion
    - - Skin cells
  - - - Tendon
      - Ligament
    - - Bone
      - Cartilage
    - - Blood
      - Lymph
  - - - Skeletal/Striated/Voluntary muscles
      - Smooth/Unstriated/Involuntary muscles
      - Cardiac muscles (involuntary)
  - - - consists of
        
        Cell Body
        
        Nucleus
        
        Cytoplasm
        
        Axon
        
        Dendrites
      - May be a metre long
- - - - Parenchyma
        
        Most common
        
        Loosely arranged, large intercellular space
        
        stores food
      - Aerenchyma
        
        Air cavities for aquatic plants
        
        Helps them float
      - Collenchyma
        
        Flexible
        
        Elongated, thick at corners, very little intercellular space
        
        allows bending without breaking, mechanical support
      - Sclerenchyma
        
        Hard and stiff
        
        Long narrow, thick walls cuz of lignin, often no internal space inside cell, ded cells
        
        strength
      - Chlorenchyma
        
        Contains chlorophyll
        
        Performs photosynthesis
    - - Xylem
        
        Transports water vertically
      - Phloem
        
        Transports food to parts of plant