B2 Topic 3 Common systems This topic looks at: Fossils and evolution The heart, blood and circulation Digestion What are the main components of blood and what do they do, add pictures to each component. What is a fossil? Why are there gaps in the fossil record? Growth in animals involved cell division what is the name for this? Stem cells are formed, what are these? How are they different from specialised cells? What are arteries, veins and capillaries. Describe and draw each below Keywords: oxygenated blood, deoxygenate blood, energy, walls, plasma, haemoglobin Label this diagram of the heart Describe the route of the blood around the heart. Keywords: muscle, growth,

B2 Topic 3 Common systems This topic looks at: Fossils and evolution The heart, blood and circulation Digestion Label the digestive system and explain what each does. Why does food need to be broken down? What are the main food groups? Growth in animals involved cell division what is the name for this? Stem cells are formed, what are these? How are they different from specialised cells? Keywords: gall bladder, oesophagus, kidney, liver, small intestine, large intestine For each food group label what it needs to be broken down into and the enzyme used to break it down. Carbohydrates  Fats  Proteins  Explain what peristalsis is draw a diagram to aid your explanation. Keywords: enzymes, acidic

B2 Topic 3 Common systems This topic looks at: Fossils and evolution The heart, blood and circulation Digestion Explain the journey of a ham and cheese sandwich through the body What is the role of bile in the digestive system. What are villi and why are they important in digestion? (how does their shape affect the rate of absorption?) Keywords: surface area, absorption, capillaries, nutrients, What are probiotics and prebiotics? Coeliac disease This is an disease which damages the villi in the small intestine. What problems could this cause? Keywords: digest, bacteria