Basic Units of Life (Chapter 6)

• Cells


  Building blocks of all living things

  Classified into unicellar organisms
• Animal cells


  Vacuole: Stores food and nutrients

  Cell membrane: Controls movement of substances in an out of the cell

  Cytoplasm: Allows chemical reactions to take place

  place

  Nucleus: Controls activities of a cell and stores hereditary materials known as chromosomes
• Plant cells

  Cell wall: Supports and maintains shape of cell

  Cell membrane: Controls movement of substances in and out of the cell

  Nucleus: Controls the activities of a cell and stores hereditary materials known as chromosomes

  Cytoplasm: Allows chemical reactions to take place

  Chloroplasts: Contains chlorophyll to absorb light for photosynthesis

  Vacuole: Stores food and nutrients
• Similarities within animal & plant cells

  1. Both has a nucleus
  2. Both contains hereditary materials such as chromosomes
  3. Both has a cytoplasm
  4. Both has a cell membrane
  5. Both undergo cell division
• Differences between animal & plant cells

  1. Plant cell has cell wall but animal cell don't
  2. Plant cell have chloroplasts for photosynthesis but animal cell don't
  3. Plant cells has large vacuoles but animal cells have smaller vacuoles
• Division of labour

  Advantages:

  -Allows more efficient and smooth functioning in the multicellar organism

  -Allows the organism to carry out more tasks at one time

  Formula: Cell->Tissue->Organ->Organ system->Organism