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 ...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.7.2 Smoking & the Human Gas Exchange System Smoking & the Gas Exchange System Smoking causes?chronic obstructive lung disease?(COPD),...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.7.1 Human Gas Exchange System Structure of the Breathing System The?lungs?are the?gas exchange surface?in humans All gas exchange surfaces ha...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.6.3 Practical: Investigating Respiration Practical: Investigating Respiration We can investigate the production of?carbon dioxide?and?heat?fr...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.6.2 Types of Respiration Aerobic Respiration Aerobic?respiration requires?oxygen It is defined as?the chemical reaction in cells that uses ox...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.6.1 Energy ATP Organisms need energy for things such as: Chemical reactions?to build larger molecules from smaller molecules Muscle contracti...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.5.11 Absorption Absorption of Food & Water The Stages of Food Breakdown Food taken into the body goes through several?different st...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.5.10 Humans: Bile Bile Production Bile is an?alkaline?substance produced by cells in the?liver Before being released into the?small intestine...
