Aqa Gcse Combined Science Trilogy B2 Study Guide Rated A+

white blood cells {Ans: Protects body against infection}CHD (coronary heart disease) {Ans: Layers of fatty material build up in coronary ateries}Digestion {Ans: Large food molecules broken down to smaller ones by enzymes which is then absorbed to the bloodstream}Malignant tumours {Ans: Invade neighbouring tissues and move into bloodstream and spread to form secondary tumours.}Structure of lungs {Ans: Protected by rib cage and separated from abdomen by diaphragm}Ateries {Ans: Carries blood away from the heart}