Tissues & Organs

• Name the five levels of organisation

  cells ➞ tissues ➞ organs ➞ organ systems ➞ organisms
• What is a Tissue?

  A group of cells with a similar structure and function
• What are 3 examples of animal tissues?

  • Muscular tissue - contract to bring about movement
  • Glandular tissue - produce substances such as enzymes or hormones
  • Epithelial tissue - covers some parts of the body
• What is an Organ?

  Collection of tissues performing specific functions
• What is an organ made of?

  tissues
• What are 8 examples of an organ?

  Heart, Lungs, Stomach, Liver, Kidneys, Brain, Skin & Gallbladder
• What is the Stomach made of?

  • muscular tissue - churn the stomach contents
  • glandular tissue - produce digestive juices
  • epithelial tissue - cover the outside & inside of the stomach
• What do the two types of glandular tissue produce in the pancreas?

  • Hormones - control blood sugar
  • Some of the digestive enzymes
• What are multicellular organisms made of?

  Organ systems that work together
• What are 3 examples of organ systems?

  • Digestive System
  • Circulatory System
  • Gas Exchange System
• Why do organs adapt?

  to be efficient exchange surfaces.
• What are the adaptations of organ systems? (4)

  Organs have:

  • large surface areas
  • short diffusion paths
  • rich blood supplies
  • mechanisms for ventilating surfaces or for moving materials