levels of organisation

• specialised cells are more efficient at their jobs but lose the ability to do other jobs
• what happens as a cell differentiates?

  • may change shape
  • different sub cellular structures develop and enable it to carry out a specific function
• name 3 specialised animal cells?

  • sperm
  • nerve
  • muscle
• name 3 specialised plant cells?

  • root hair
  • xylem
  • phloem
• a tissue is a group of cells with a similar structure and function which all work together to do a job
• tissue jobs:

  • muscles contracts to produce movement
  • glands produce substances such as enzymes and hormones
  • epithelial tissue covers organs
• digestive system order:

  • mouth
  • oesophagus
  • stomach
  • small intestine
  • large intestine
  • anus