CIE IGCSE Biology: 复习笔记：9.1.11 Circulation Around the Body Main Blood Vessels in the Body Blood is carried away from the heart and towards organs in arteries These narrow to arterioles and the...
CIE IGCSE Biology: 复习笔记：9.1.10 Blood Vessels Arteries, Veins & Capillaries Arteries Carry blood at high pressure away from the heart Carry oxygenated blood (other than the pulmonary artery...
CIE IGCSE Biology: 复习笔记：9.1.9 Explaining the Effect of Physical Activity on Heart Rate: Extended Explaining the Effect of Physical Activity on Heart Rate: Extended So that sufficient blood is ...
CIE IGCSE Biology: 复习笔记：9.1.8 Functioning of the Heart: Extended Functioning of the Heart: Extended Deoxygenated blood coming from the body flows into the right atrium via the vena cava Once t...
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...
