Biology: Year 9 Term 2: Organisational Hierarchy & the Digestive System 5.0 / 5 based on 1 rating ? BiologyCells, tissues and organsGCSEAQA Created by: Charlotte HerondaleCreated on: 18-01-18 18:28 Define cell. (1) The smallest biological building block in any organism. 1 of 9 Define tissue. (1) A group of the same cells that wok together 2 of 9 Define organ. (1) A group of different types of tissue that work together to carry out a bodily process 3 of 9 What are the 6 main organ systems? (6) Cardiovascular, Skeletal, Reproductive, Nervous, Muscular, Digestive 4 of 9 What is chemical digestion? (2) Breaking down of food by breaking chemical bonds eg via enzymes 5 of 9 What is physical digestion? (2) Breaking down of food by breaking physical bonds eg via chewing 6 of 9 Define peristalsis. (2) The contractions used to push food along digestive tubes like the oesophagus 7 of 9 Why are the stomach's walls coated in mucus? (2) To stop the hydrochloric acid from eating them away 8 of 9 What is the overall function of the digestive system? (3) To break down food so its nutrients and water can be absorbed and used and the waste be removed 9 of 9
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