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Cells Structures and Their Functions. (Pages 38-45). Cells. Are the smallest unit of life that carries out all life functions Contain major structures inside that perform these life functions Vary in size, but contain many of the same structures. Organelles (Structures) of the cell.

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Presentation Transcript
cells
Cells
  • Are the smallest unit of life that carries out all life functions
  • Contain major structures inside that perform these life functions
  • Vary in size, but contain many of the same structures
organelles structures of the cell
Organelles (Structures) of the cell

Cell Membrane

  • outside covering of the a cell that controls what comes in and out of the cell
  • Analogy -
nucleus
Nucleus
  • contains Genetic Material (DNA)
  • is the control center of the cell
  • Analogy -
cytoplasm
Cytoplasm
  • gel-like fluid inside a cell
  • the other organelles are embedded in the cytoplasm
  • Analogy -
mitochondria
Mitochondria
  • uses oxygen to release energy from food
  • sometimes called the powerhouse of the cell
  • Analogy -
slide7
Vacuoles
  • act as storage centers

Cell wall

  • Provides extra support and shape for plant cells, it is made mostly of cellulose
  • Analogy -
chloroplast
Chloroplast
  • food-making structures of a plant cell
comparing plant and animal cells
Comparing Plant and Animal Cells
  • Plant cells have a cell wall (to give extra support and shape), but animal cells do not.
  • Plant cells have chloroplasts (that enable plants make their own food), but animal cells do not.
comparing plant and animal cells10
Comparing Plant and Animal Cells
  • Plant cells usually have one or more large vacuole(s) (help provide shape and allow the plant to store water and food for future use), while animal cells have smaller vacuoles,if any are present.
classifying bacteria
Classifying Bacteria
  • Kingdom Monera
  • Single celled
  • Smaller than plant or animal cells
  • Has a cell wall
  • Has a cell membrane
  • Has cytoplasm
bacteria
Bacteria
  • Does not have a nucleus
  • Genetic material is found spread throughout the cell
3 shapes of bacteria
3 Shapes of Bacteria
  • Round – called Cocci
  • Rod shaped – called Bacilli
  • Spiral – corkscrew shaped called Spirilla