Edexcel IGCSE Biology 复习笔记 2.8.8 Human Transport Systems: White Blood Cells & Immunity White Blood Cells White blood cells are part of the body’s immune system These specialised cells defen...
Edexcel IGCSE Biology 复习笔记 2.8.9 Vaccinations Vaccinations Vaccines are used to induce immunity to infectious diseases A vaccine contains harmless versions of a pathogen There are severa...
Edexcel IGCSE Biology 复习笔记 2.8.7 Human Transport Systems: Platelets Platelets Platelets are involved in helping the blood clot Platelets are fragments of cells that are involved in blood...
Edexcel IGCSE Biology 复习笔记 2.8.6 Human Transport Systems: Red Blood Cells & Plasma Red Blood Cells Red blood cells are specialised cells which carry oxygen to respiring cells They ar...
Edexcel IGCSE Biology 复习笔记 2.8.5 Human Transport Systems: Blood Components of Blood Blood consists of red blood cells, white blood cells, platelets and plasma Over half of the volume of ...
Edexcel IGCSE Biology 复习笔记 2.8.4 Practical: Factors Affecting Transpiration Practical: Factors Affecting Transpiration We can investigate the effect of different environmental conditions...
Edexcel IGCSE Biology 复习笔记 2.8.3 Water Movement in Flowering Plants Root Hair Cells Uptake of water into the root Root hair cells are adapted for the efficient uptake of water (by osmosi...
Edexcel IGCSE Biology 复习笔记 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 the plant Plants ...
Edexcel IGCSE Biology 复习笔记 2.8.1 The Requirement for Transport Systems Unicellular Organisms In order for any organism to function properly, it needs to exchange substances, such as food...
