CIE IGCSE Biology: 复习笔记：9.1.7 Identifying Structures in the Heart: Extended Identifying Structures in the Heart: Extended The ventricles have thicker muscle walls than the atria as they are pu...
CIE IGCSE Biology: 复习笔记：9.1.6 Coronary Heart Disease Coronary Heart Disease The coronary arteries The heart is made of muscle cells that need their own supply of blood to deliver oxygen, gluco...
CIE IGCSE Biology: 复习笔记：9.1.5 Investigating Effect of Physical Activity on Heart Rate Investigating Effect of Physical Activity on Heart Rate It is relatively simple to investigate the effects...
CIE IGCSE Biology: 复习笔记：9.1.4 Monitoring Activity of the Heart Monitoring Activity of the Heart Heart activity can be monitored by using an ECG, measuring pulse rate or listening to the sounds...
CIE IGCSE Biology: 复习笔记：9.1.2 Circulatory System: Extended Circulatory Systems of Fish & Mammals: Extended Circulatory systems in Fish Fish have a two-chambered heart and a single c...
CIE IGCSE Biology: 复习笔记：9.1.1 Circulatory System Circulatory System The circulatory system is a system of blood vessels with a pump and valves to ensure one-way flow of blood An example of a c...
CIE IGCSE Biology: 复习笔记：8.1.8 Translocation Translocation The soluble products of photosynthesis are sugars (mainly sucrose) and amino acids These are transported around the plant in the phloe...
CIE IGCSE Biology: 复习笔记：8.1.7 Explaining the Effects of Temperature, Wind Speed & Humidity: Extended Explaining the Effects of Temperature, Wind Speed & Humidity: Extended Wind speed, ...
CIE IGCSE Biology: 复习笔记：8.1.6 Transpiration Stream: Extended Water Vapour Loss: Extended Evaporation takes place from the surfaces of spongy mesophyll cells The many interconnecting air spaces...
