Levels of Organisms

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

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

  Subcellular structures
• What is the role of organelles in a cell?

  Each has a specific role to play
• What do multiple organelles combine to form?

  A single cell
• What are specialized cells?

  Different types of cells with specific functions
• Name three types of specialized cells.

  Epithelial cells, muscle cells, glandular cells
• 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 do glandular cells form?

  Glandular tissue
• What is the role of glandular tissue?

  Making and secreting chemicals
• What defines an organ?

  A group of different tissues working together
• How does the definition of an organ differ from that of a tissue?

  An organ is made of different tissues
• What organ is formed by epithelial, muscular, and glandular tissues?

  The stomach
• What is the function of the stomach?

  Killing microorganisms and breaking down proteins
• What is an organ system?

  A group of organs working together
• Which organs form the digestive system?

  Stomach, pancreas, and liver
• What is the role of the digestive system?

  Digesting food and absorbing nutrients
• Name two other organ systems.

  Cardiovascular system and reproductive system
• What is the highest level of organization in a multicellular organism?

  The whole organism
• How many different organ systems are there approximately?

  About 12 different organ systems
• Name three other organs besides the stomach.

  Skin, lungs, and liver
• What are the levels of organization in a multicellular organism?

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

  • Epithelial tissue: Covers surfaces
  • Muscle tissue: Contracts and relaxes
  • Glandular tissue: Makes and secretes chemicals
• What are the functions of the digestive system?

  • Digests food
  • Absorbs nutrients
• What are some examples of organ systems?

  • Cardiovascular system
  • Reproductive system
  • Nervous system
  • Respiratory system
  • Endocrine system
  • Urinary system