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Flashcards · Biology · Digestion and Enzymes

Levels of Organisation and the Digestive System

26 cards

  1. What is a tissue?

    A group of similar cells that work together to do a particular job.

  2. What is an organ?

    A group of different tissues that work together to do a particular job.

  3. What is an organ system?

    A group of organs that work together to do a particular job.

  4. List the levels of organisation in order, from smallest to largest.

    Cell, tissue, organ, organ system, organism.

  5. Give an example of an organ.

    The stomach.

  6. Give an example of an organ system.

    The digestive system.

  7. Which three tissues are found in the stomach?

    Muscular tissue, glandular tissue and epithelial tissue.

  8. What does muscular tissue do in the stomach?

    It contracts to churn the food and mix it with digestive juices.

  9. What does glandular tissue do in the stomach?

    It makes digestive juices, including hydrochloric acid and enzymes.

  10. What does epithelial tissue do in the stomach?

    It covers the inside and outside surfaces of the organ.

  11. What is the job of the digestive system?

    To break food down into small molecules and absorb them into the blood.

  12. What is the job of the salivary glands?

    They release saliva, which contains amylase.

  13. What does the oesophagus do?

    It squeezes food down to the stomach.

  14. What does the stomach do?

    It churns the food and mixes it with acid and protease.

  15. What does the liver make?

    Bile.

  16. What does the gall bladder do?

    It stores bile until it is needed.

  17. What does the pancreas do?

    It makes digestive enzymes and releases them into the small intestine.

  18. Where is digested food absorbed into the blood?

    The small intestine.

  19. What does the large intestine do?

    It absorbs water from the undigested food.

  20. Why must food be digested?

    Large molecules are too big to pass through the gut wall, so they have to be broken into small soluble ones.

  21. Name the small molecules that food is broken down into.

    Sugars, amino acids, and fatty acids and glycerol.

  22. How many micrometres are there in 1 millimetre?

    1000.

  23. A diagram of the digestive system with a marker X on the pancreas. What is the organ marked X, and what does it make?

    The pancreas. It makes digestive enzymes (amylase, protease and lipase) and releases them into the small intestine.

  24. An unlabelled diagram of the digestive system. Label the organs of the digestive system. The digestive system with every organ labelled.

  25. Five numbered pictures from a single cell to a whole human with no labels. Name the five levels of organisation, 1 to 5. The levels of organisation labelled from cell to organism.

  26. Name the three tissues in the wall of the stomach and give the job of each. The three tissues in the wall of the stomach, labelled with their jobs.

    Muscular tissue contracts to churn the food. Glandular tissue makes digestive juices, including acid and enzymes. Epithelial tissue covers the inside and outside surfaces.