7A Cells, tissues, organs & organ systems

• A cell is a very small unit of living matter
• Cells contain cells parts, known as organelles
• All living things including plants and animals are made up of cells
• All living things are called organisms
• Tissues


  Work together to form organs
• Types of tissues

  • Muscle tissue
  • Fat tissue
  • Nerve tissue
• Muscle tissue

  • Contracts to move and pump the blood
• Fat tissue


  • Helps to protect the heart
• Nerve tissue


  • Protects the heart
• Nucleus

  Found in animal and plant cell

  Job: To control the activities of the cells. Contains genetic information (DNA)
• Vacuole

  Found in Plant cell

  Job: Large space containing cell sap. Helps to keep cells rigid to support the plant.
• Mitochondria

  Found in Plant and animal cells

  Job: This is where energy Is released from food in respiration
• Cell Wall

  Found in plant cells

  Job: A strong rigid layer around the cell to provide strength and support. Made of cellulose.
• Cytoplasm

  Found in animal and plant cell

  Job: A liquid je-like substance where chemical reactions take place.
• Cell membrane

  Found in plant and animal cell

  Job: Control a the movement of substances in and out of the cells.
• Chloroplast

  Found in plant cells

  JOB: Absorbs light energy take food in photosynthesis
• Specialised cell

  A cell with specific features that help it to do a specific job
• Specialised cells in plants

  • Root hair cells
  • Xylem Cells
• Specialised cells in animals

  • Sperm cells
• Cytoplasm

  Where chemical reactions take place in a cell
• Animal Specialised Cells

  • Red Blood Cells
  • Nerve Cells
  • White Blood Cells
  • Sperm Cells
  • Muscle Cells
  • Egg Cells
• Plant specialised Cells

  • Root hair Cells
  • Palisades Cells
  • Xylem Cells
• The two types of microscopes are the light microscope and the electron microscope.
• The two parts of the microscope that magnify the image are the objective lens and the eyepiece lens
• Finding the total magnification of a microscope

  When we use a microscope we need to know how much the object has been magnified by. This is so that later on, we can figure out the actual size of the object

  The Equation; Objective lens (x4) times Eyepiece lens(x10)

  Total magnification = 40
• Animal cell structure


  Meat feels squishy and malleable
• Plant cell structure


  Fruit and vegetables have a nice crunch and firmness
• organelles are part of cells
• Animal specialised cells

  • red blood cells
  • Egg cells
  • Sperm cells
• Plant specialised cells

  • Root hair cells
  • xylem cells
• A specialised cell has a specific job to do