Cells, tissues, organs and organ systems

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

  Each has a specific role to play
• Name three examples of organelles.

  Nucleus, ribosomes, mitochondria
• What do we call different types of cells that have specific functions?

  Specialized cells
• Give examples 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 is formed by epithelial cells?

  Epithelial tissue
• What is the function of epithelial tissue?

  Covering the body's surfaces
• What is the function of muscle tissue?

  Contracting and relaxing to move body parts
• What does glandular tissue do?

  Makes and secretes chemicals like enzymes
• What defines an organ?

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

  Organs consist of different tissues, not similar cells
• 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, liver, and others
• What is the role of the digestive system?

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

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

  The whole organism
• How many organ systems are there in the human body?

  About 12 different organ systems
• Name three examples of organs in the human body.

  Skin, lungs, liver
• What are some examples of organ systems in the human body?

  Immune system, nervous system, respiratory system
• What is the relationship between cells, tissues, and organs?

  • Cells form tissues
  • Tissues form organs
  • Organs perform specific functions
• What are the levels of organization in a multicellular organism?

  • Organelles
  • Cells
  • Tissues
  • Organs
  • Organ systems
  • Organism