11.1.2 Cells, Tissues & Organs

• What is the term used for the structures inside a cell?

  Organelles
• What are the basic structures of an animal cell?

  • Organelles
  • Cell membrane
  • Cytoplasm
  • Nucleus
  • Mitochondria
  • Ribosomes
• What are the size ranges for animal and plant cells?

  • Animal cells: 0.01 mm – 0.05 mm
  • Plant cells: 0.01 mm – 0.10 mm
• How many micrometers are in 1 mm?

  1 mm = 1000 micrometers (µm)
• If a cell measures 20 mm, how many micrometers is that?

  20 mm = 20,000 µm
• What is the hierarchy of organization in biological systems?

  • Cells
  • Tissues
  • Organs
  • Organ systems
  • Organism
• What are examples of organ systems and their organs?

  • Circulatory system: Heart, blood vessels
  • Respiratory system: Lungs, trachea
  • Digestive system: Stomach, intestines
  • Nervous system: Brain, spinal cord