Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.9.1 Excretion The Need for Excretion in Humans Many of the necessary?metabolic reactions?that take place within the cells of organisms produc...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.8.7 Blood Vessels & the Circulatory System Blood Vessels There are three main types of blood vessel: Arteries Veins Capillaries Sm...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.8.6 The Heart Structure & Function of the Heart The heart organ is a?double pump Oxygenated blood?from the lungs enters the?left?side of ...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.8.5 Human Transport Systems: White Blood Cells & Immunity White Blood Cells White blood cells are part of the body’s?immune system These ...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.8.4 Human Transport Systems: Red Blood Cells & Plasma Red Blood Cells Red blood cells are?specialised cells?which carry?oxygen to respiri...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.8.3 Human Transport Systems: Blood Components of the Blood: An Overview Blood consists of?red blood cells, white blood cells, platelets?and?p...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.8.2 Transport Systems in Flowering Plants Xylem The?roots,?stem?and?leaves?form a plant organ system for the transport of substances around t...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.8.1 The Requirement for Transport Systems Unicellular Organisms In order for any organism to function properly, it needs to?exchange substanc...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.7.3 Practical: The Effect of Exercise on Breathing Practical: The Effect of Exercise on Breathing Exercise causes the?frequency of breathing ...
