Cells

• Meiosis


  Reproductive cells called gamates (ovum + spermatoza) unite and combine their genetic material during fertilisation creating ‘genetic recombination’
• Mitosis

  • Interphase - period of cell growth
  • Prophase - Chromomes double
  • Pro-metaphase - Nucleus and Nucleolus break down
  • Metaphase - Chromonses aline to middle cell
  • Anaphase - Spindle pull and spilt chromosomes and pull them apart
  • Telophase - Spindles die, 2 new nucleus and nucleolus
  • Cytokinesis - Two daughter calls form
• Tissues


  A group of cells which share a common structure and function known as tissue
• Organs


  When groups of different tissue types each other with a unique function come together and a organ is created
• Systems


  A group of organs that work together to perfom a specific fuction
• Types of human tissue

  connective

  nervous

  muscular

  epithelial
• Membrane


  Sureounds cell and gives a boundary between one cell and the next
• Nucleus


  Centre of the cell

  Regulates the cells functions
• DNA


  Condensed into thread like structures called chromosomes
• Nucleolus


  Copies of DNA are made here in order for the information inside to be used
• Ribosomes


  Produces protein in the form of amino acids
• Mitochondria


  Converts food to energery
• Lysosomes


  Components that wear out are recycled here
• Golgi Body


  Stores protein ready for transportation out the cell
• Cytoplasm


  All contents of the cell is contained here
• Osmosis


  Movement of water molecules from an area with high concentration of water to a low concentratiob
• Epithelial Tissue (Simple)


  Simple Squasmous - Lines heart and blood vessels

  Simple Cuboidal - involved in secretion

  Simple Columnar - Lines organs e.g Stomach
• Epithelial Tissue (Stratified)


  Stratified Squamous - Grow towards surface

  Keratinised Stratified - Found in fry areas

  Non-Keratinized Stratified - Wheres areas need to be kept moist
• Example of Connective Tissue (3)


  1.Bone

  2.Adipose

  3.Lymphatic
• Examples of Muscle Tissue (3)

  1.Voluntary

  2.Involuntary

  3.Cardiac
• Tissue Healing

  1.Bleeding - Platelets clot blood

  2.Inflammation - Reddness

  3.Proliferation (Healing) - Sealed Wound

  4. Remodelling Phase
• Pathologies

  Cancer

  Metastasis

  Scarring