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level: 7.3 Circulatory system of a mammal

Questions and Answers List

level questions: 7.3 Circulatory system of a mammal

QuestionAnswer
Why large organisms have a transport system- Have a low SA: volume ratio - So they need a specialised transport system to carry raw materials from specialised exchange organs to cells - circulatory system
Closed circulatory system- Blood confined to vessels
The circulatory system- Made up of heart + blood vessels - Heart pumps blood to blood vessels to reach different parts of body - Blood transports respiratory gases, products of digestion, metabolic wastes + hormones
Double circulatory system- Mammals have a closed, double circulatory system - 2 circuits - One circuit takes blood from heart to lungs - One circuit takes blood around the rest of body