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B5 Cells Tissues Organs Review Slides


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B5 Cells Tissues Organs Review Slides

  2. 2. CELLS TISSUES AND ORGANS <ul><li>Aims </li></ul><ul><li>To review key stage 3 Cells, tissues and organs. </li></ul><ul><li>To review specialised cells </li></ul>
  3. 3. What are Cells? Review pupils' knowledge of cells <ul><li>Ask questions about the roles these parts play in the life of the cell {Animal Cell} </li></ul><ul><li>Cell Wall </li></ul><ul><li>Cytoplasm </li></ul><ul><li>Nucleus </li></ul>
  4. 4. Facts About Cell Wall <ul><li>The cell wall is thin skin around the cell </li></ul><ul><li>The cell wall gives the cell its shape </li></ul><ul><li>The cell wall regulates what goes into and out of the cell </li></ul><ul><li>The lack of a rigid cell wall allowed animals to develop a greater diversity of cell types, tissues, and organs. </li></ul>You should know that
  5. 5. Facts About Cytoplasm <ul><li>The cytoplasm is the part of a cell that is enclosed within the cell wall {it fills the interior of the cell} </li></ul><ul><li>The main function of the cytoplasm is to hold the basic components {called cell organelles} which controls the activities and functions of the cell. </li></ul>You should know that
  6. 6. Facts About Nucleus <ul><li>The nucleus consists of four basic sub structures – nuclear envelope, nucleolus, chromatin and nucleoplasm </li></ul><ul><li>Nuclear Envelope: selectively allows or controls the movement of certain substances or chemicals into or out of the cell nucleus. </li></ul><ul><li>Chromatin: made up of very thin DNA strands which issues instructions for heredity and cell metabolism </li></ul><ul><li>Nucleolus: Is the site where DNA instructions or information are duplicated or copied. It also helps in protein synthesis along side organelles called ribosomes . </li></ul>You should know that
  7. 7. The Nucleus The nucleus controls what the cell does and is the ‘biological bank’ that contains the instructions to make new cell You should know that
  8. 8. SPECIALISED CELLS <ul><li>What does the word ‘specialised’ mean to you? </li></ul><ul><li>Explain the concept ‘specialised cells’ </li></ul><ul><li>Make a list of specialised cells in your body </li></ul>Quick quiz 5 minutes
  9. 9. SPECIALISED CELLS Many cells in your body look different because they have their own specific or special jobs to do. Specialised cells are cells in plants and animals that carry out specific functions or do special jobs or a particular job. You should know that
  10. 10. <ul><li>What is the name of the cell shown below? Is the cell a specialised cell or not? </li></ul><ul><li>Explain how its structure might help the cell to carry its function. </li></ul>
  11. 11. <ul><li>ANSWERS </li></ul><ul><li>What is the name of the cell shown below? Is the cell a specialised cell or not? </li></ul><ul><li>Explain how its structure might help the cell to carry its function. </li></ul><ul><li>Sperm cells are very small and has a tail which provides movement so it can swim and find the egg. </li></ul><ul><li>The head of the sperm cell contains enzymes which allow it to break into the egg cell to enable the process fertilization. </li></ul><ul><li>The sperm cell contains the genetic information from the father some of which are passed to the offspring. </li></ul>
  12. 12. THE FEMALE EGG CELL Write down all you know about the female egg cell and explain why they are specialized cells.
  13. 13. Why are Red blood cells classified as specialised cells?
  14. 14. How Specialised are these Cells? <ul><li>Red blood cells </li></ul><ul><li>Nerve cells </li></ul><ul><li>Bone cells </li></ul><ul><li>Sperm cells </li></ul><ul><li>Egg cells </li></ul><ul><li>Muscle cells </li></ul><ul><li>Leaf palisade cells </li></ul><ul><li>Xylem cells </li></ul><ul><li>Root hair cells </li></ul>Why are these cells specialised cells? What are their functions
  15. 15. TISSUES Say whether this statement is TRUE, FALSE or NOT SURE and explain your choice of answer. Cells are the basic units or building blocks of life and are organized into tissues from which organs are made
  16. 16. WHAT ARE TISSUES? A group of similar cells {cells that look the same and do the same job} is called a tissue
  17. 17. WHAT ARE ORGANS An organ is made up of different tissues that work together to do a specific task or job. Is your heart an organ? Yes or No? And explain why. Do you mind explaining why your skin is an organ?