Tutorial

iGCSE Biology: Learn Circulatory Systems

Learn the difference between single and double circulatory systems in mammals and fish for iGCSE Biology. This deck explains the pulmonary and systemic circuits and the advantages of double circulation.
A dynamic, low-angle photograph of a marathon runner sprinting towards the finish line, sweat glistening, muscles tensed, with a blurred stadium background. The image powerfully conveys peak human performance and the efficient delivery of oxygen and nutrients through a robust double circulatory system.

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Deck Contents

19 Cards
Lesson#1
To transport substances like oxygen and nutrients around the body, larger animals need a circulatory system. A circulatory system has three main parts: a pump, vessels for the blood to travel in, and structures to ensure the blood flows in only one direction.
Quiz#2
In a circulatory system, what organ acts as the pump to move blood?

the heart

Quiz#3
In a circulatory system, what structures are responsible for maintaining one-way blood flow?

valves

Lesson#4
Let's start with the simplest type, called a single circulation, which is found in fish. In a single circulation system, the blood passes through the heart only once for each complete circuit of the body. The route is: heart to gills, then to the rest of the body, and finally back to the heart.
Quiz#5
What is the term for a circulatory system where blood passes through the heart only once for each complete circuit of the body?

single circulation

Quiz#6
Which group of animals typically has a single circulatory system?

fish

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