Edexcel IGCSE Biology 复习笔记 2.9.1 Excretion
Edexcel IGCSE Biology 复习笔记 2.9.1 Excretion The Need for Excretion in Humans Many of the necessary metabolic reactions that take place within the cells of organisms produce waste products...
Edexcel IGCSE Biology 复习笔记 2.8.11 Blood Vessels & the Circulatory System
Edexcel IGCSE Biology 复习笔记 2.8.11 Blood Vessels & the Circulatory System Blood Vessels There are three main types of blood vessel: Arteries Veins Capillaries Smaller vessels t...
Edexcel IGCSE Biology 复习笔记 2.8.10 The Heart
Edexcel IGCSE Biology 复习笔记 2.8.10 The Heart Structure & Function of the Heart The heart organ is a double pump Oxygenated blood from the lungs enters the left side of the heart and i...
Edexcel IGCSE Biology 复习笔记 2.8.8 Human Transport Systems: White Blood Cells & Immunity
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
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
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
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
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
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...
