Animal Tissues

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  • Animal Tissues
    • Epithelial Tissue
      • Tightly packed, small intercellular spaces, basement membrane-underlies the tissue
      • Functions: 1.Protection from- injury, loss of water, invasion by micro-organisms    2. Secretes chemical substances (glands), Absorbs nutrients (in small intestine), removes dust particles (air passages), excretes waste (sweat from skin)
      • Found: Covering the body on the outside and lines internal organs
      • Squamous Epithelium
        • Types: Simple and stratified. Thin, irregular cells with large nucleus
        • Found: Skin surface, lines mouth, oesophagus, vagina and blood vessels
      • Cuboidal Epithelium
        • Cells are square shaped
        • Found: Lines ducts of glands and tubules of kidneys
      • Columnar Epithellum
        • Elongated cells
        • Found: Lines intestines and gall bladder
      • Ciliated Columnar
        • Elongated cells, has cilia on surface
        • Found: Lines trachea and fallopian tubes
        • Goblet cell makes and secretes mucus- Mucus and cilia work together (trachea), cilia beating helps egg move down fallopian (fallopian)
    • Connective Tissue
      • Ligaments, tendons, cartilage, bone, blood (only liquid)
      • Erythrocytes (red blood cells)
        • No nucleus, cells are biconcave disks, contain haemoglobin (carry O2 in blood)
      • Leucocytes (white blood cells)
        • Produces antibodies to destroy pathogens (disease causing organism)
      • Platelets
        • Clots blood
      • Plasma
        • Liquid part of blood. Plasma trasports- water, liquid salts, nutrients, hormons, components (erythrocytes, leucocytes, platelets)
    • Nerve Tissue
      • Nerve cells- neurons
        • Made of: Fibres-axons and dendrites that transport nerve impulses and cell bodies
      • Sensory Neurons
        • Transmits information from receptors to CNS
      • Motor Neurons
        • Transmits information from CNS (central nervous system- brain and spinal chord)
      • Internevous Neurons
        • Connects sensory and motor neurons
    • Muscle Tissue
      • Specialised tissue that can control and relax
      • Skeletal Muscle
        • Striated muscle-attached to bone. Responsible for voluntary movement
      • Smooth Muscle
        • Contractions are slower. Responsible for involuntary movement (stomach intestines)
      • Cardiac Muscle
        • Only found in walls of the heart
        • Involuntary contractions and maintains constant rhythmic contractions


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