cells tissues organs organ system

• What are the different levels of organization in a multicellular organism?

  Organelles, cells, tissues, organs, organ systems, organisms
• What are organelles also known as?

  Subcellular structures
• How can tissues be described?

  A group of similar cells working together
• What type of tissue do epithelial cells form?

  Epithelial tissue
• What is the function of epithelial tissue?

  Covering the body's surfaces
• What do muscle cells form?

  Muscle tissue
• What is the function of muscle tissue?

  Contracting and relaxing to move body parts
• What defines an organ?

  A group of different tissues working together
• What is the function of the stomach?

  Killing microorganisms and breaking down proteins
• What are the levels of organization in a multicellular organism?

  • Organelles
  • Cells
  • Tissues
  • Organs
  • Organ systems
  • Organism
• What are the functions of different organ systems?

  • Digestive system: Digests food and absorbs nutrients
  • Cardiovascular system: Transports blood and oxygen
  • Reproductive system: Produces offspring
  • Immune system: Defends against pathogens