having a surface ratio. Describe overall area trends. Discuss a membrane that is thin, implications for to provide a short diffusion and how a circulatory/transport diffusion path system enables larger (in animals) having an efficient blood supply organisms to develop. (in animals, for gaseous Use graphs to estimate exchange) being other SA:volume ratios. ventilated. MS 1c Calculate and compare surface area:volume ratios. 4.2.1.3 The heart is a muscular Describe the 3 Describe the functions of the Demo: show a model Model heart organ that pumps blood functions of the heart heart and circulatory system. heart and identify the Teachit Science around the body in a dual and circulatory chambers, main blood Show pictures of a single and resources circulatory system. system vessels and valves. a double circulatory system. Demo: heart and The ventricle pumps Describe and label a Students write down Demo: Heart and lungs lungs of pig with blood to the lungs where diagram of the heart similarities and differences. of a pig to show the vessels attached, gas exchange takes place. showing four Discuss the reasons why. associated vessels. board, scissors, The left ventricle pumps chambers, vena cava, Allow students to feel Use computer simulation to mounted needle, blood around the rest of the pulmonary artery, the vessels. Show show the flow of blood around gloves. body. pulmonary vein and students how to dissect the heart, lungs and body. Dissection: hearts aorta. their pig hearts and Valves prevent the from Students model the with vessels identify the vessels. flowing back from the circulatory system. attached, boards,
having a surface area a membrane that is thin, to provide a short diffusion path (in animals) having an efficient blood supply (in animals, for gaseous exchange) being ventilated. ratio. Describe overall trends. Discuss implications for diffusion and how a circulatory/transport system enables larger organisms to develop. Use graphs to estimate other SA:volume ratios. MS 1c Calculate and compare surface area:volume ratios. 4.2.1.3 The heart is a muscular organ that pumps blood around the body in a dual circulatory system. The ventricle pumps blood to the lungs where gas exchange takes place. The left ventricle pumps blood around the rest of the body. Valves prevent the from flowing back from the Describe the functions of the heart and circulatory system Describe and label a diagram of the heart showing four chambers, vena cava, pulmonary artery, pulmonary vein and aorta. 3 Describe the functions of the heart and circulatory system. Show pictures of a single and a double circulatory system. Students write down similarities and differences. Discuss the reasons why. Use computer simulation to show the flow of blood around the heart, lungs and body. Students model the circulatory system. Demo: show a model heart and identify the chambers, main blood vessels and valves. Demo: Heart and lungs of a pig to show the associated vessels. Allow students to feel the vessels. Show students how to dissect their pig hearts and identify the vessels. Model heart Teachit Science resources Demo: heart and lungs of pig with vessels attached, board, scissors, mounted needle, gloves. Dissection: hearts with vessels attached, boards,
AQA-8465-SOW-TOLD.DOCX