3(a)(i)Heart CirculationMedium1 markFigure 3.1 shows three types of blood vessels in the human body.Use Figure 3.1 to identify the types of blood vessels labelled J and K.AJ: vein; K: arteryBJ: artery; K: capillaryCJ: capillary; K: veinDJ: artery; K: veinEJ: vein; K: capillaryFJ: capillary; K: arteryGJ: artery; K: arteryHJ: vein; K: veinGrade answerSolutionGrading criteria
3(a)(ii)Heart CirculationEasy1 markOn Figure 3.1, draw a label line and the letter P to show where the pressure of blood is at its highest.PenEraserUndoRedoClearDraw with the mouse or a finger.Grade answerGrading criteria
3(a)(iii)Heart CirculationHard5 marksExplain how the structure of capillaries is related to their functions.AnswerTypeWriteMath0 wordsGrade answerGrading criteria
3(b)(i)Blood Clotting Oxygen TransportEasy2 marksWhite blood cells are one component of blood. Name two other components of blood.Two answers required.AlymphBplateletsCbileDtissue fluidEplasmaFbone marrowGcerebrospinal fluidHmucusGrade answerSolutionGrading criteria
3(b)(ii)Immune System DefencesHard4 marksLymphocytes are one type of white blood cell. Explain how lymphocytes protect the body from infection.AnswerTypeWriteMath0 wordsGrade answerGrading criteria