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CBSE Class 10 Answered

SA type II Questions :
Q1. Blood does not clot in the blood vessels. Give reason.
Q2. How is double circulation different from single circulation? 
Asked by pdcavita | 01 Dec, 2017, 09:53: PM
answered-by-expert Expert Answer
1. Inside the vessel there is presence of anticoagulant which do no let the blood to coagulate.
2. When the blood flows through the heat two times it is called as double circulation. It mainly takes place in amphibians, birds and mammals.In contrast to the animals, fish have only one circulation system where the blood passes only once through the heart called as single circulation.
Answered by Sivanand Patnaik | 02 Dec, 2017, 08:43: AM
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