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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復(fù)習(xí)筆記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...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 3.11.1 Differentiation - Basics
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Edexcel IGCSE Maths 復(fù)習(xí)筆記 3.10.1 Solving Equations using Graphs
Edexcel IGCSE Maths 復(fù)習(xí)筆記 3.10.1 Solving Equations using Graphs How do we use graphs to solve equations? Solutions are always read off the?x-axis Solutions of?f(x) = 0?are where the graph of?y =...
AQA A Level Biology復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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...
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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復(fù)習(xí)筆記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...
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