AQA A Level Biology复习笔记3.5.7 Capillaries & Tissue Fluid
Capillaries & Tissue Fluid Capillaries are another type of blood vessel present in the circulatory system They have thin walls which are “leaky”, allowing substances to leave the blood t...
AQA A Level Biology复习笔记3.5.6 Blood Vessels
Arteries, Arterioles & Veins The body contains several different types of blood vessel: Arteries: transport blood away from the heart (usually at high pressure) Veins: transport blood to...
AQA A Level Biology复习笔记3.5.5 Investigating Heart Rate
Apparatus & Techniques: Investing Factors Affecting Heart Rate There are a wide range of factors that influence the heart rate of an organism Experiments can be designed to investigate t...
如何提高A-Level经济学写作？A-Level经济学写作课程来啦！
根据经济导师分享的【A-Level Economics 经济新考纲解读】（戳蓝字查看详情），同学们应该了解到2023年经济学整体最大的变化是：加大了Essay部分的考察，对于不擅长经济学写作的同学，难度呈现明显向上增加的趋...
AQA A Level Biology复习笔记3.5.4 The Cardiac Cycle
The Cardiac Cycle The contraction of the heart is called systole, while the relaxation of the heart is called diastole Atrial systole is the period when the atria are contracting and ventric...
AQA A Level Biology复习笔记3.5.3 The Walls of the Heart
The Walls of the Heart The muscular walls of the atria are thinner than those of the ventricles When the atria contract, the thin muscular walls do not generate much pressure, but enough to ...
AQA A Level Biology复习笔记3.5.2 The Human Heart
Mammalian Heart Structure Heart structure The human heart has a mass of around 300g and is roughly the size of a closed fist The heart is a hollow, muscular organ located in the chest cavity...
AQA A Level Biology复习笔记3.4.7 Animal Adaptations For Their Environment
Animal Adaptations For Their Environment Different types of haemoglobin Haemoglobin is a quaternary protein made up of four globin polypeptides and four haem groups The structure of haem is ...
AQA A Level Biology复习笔记3.4.6 Cardiac Output
Maths Skill: Using the Cardiac Output Equation Cardiac output (CO) is the term used to describe the volume of blood that is pumped by the heart (the left and right ventricle) per unit of tim...
