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PART - 2 - Unit V : CH - 15 Body Fluids and Circulation — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYPART - 2 - Unit V : CH - 15 Body Fluids and Circulation3 Marks
Question
What is blood circulation system? Explain the difference between single circulation and double circulation.
✓

Answer

Blood Circulatory System : In humans, the system that transports $O _2$ and $CO _2$, nutrients, excretory substances and secretory substances from one part of the body to another is called blood circulatory system.
Differences between single circulation and double circulation
S.No.Single CirculationDouble Circulation
1. Blood passes through the heart once in a complete cycle. Blood passes through the heart twice.
2. The heart pumps deoxygenated blood. The heart pumps deoxygenated blood to the lungs and sends oxygenated blood to the body.
3. Blood is oxygenated by gills. Blood is oxygenated by the lungs.
4. This type of circulation is found in  This type of circulation is found in mammals, birds,Reptiles etc.
5. There are two chambers in the heart which are called atrium and ventricle respectively. There are four chambers in the heart which are called two atriums and two ventricles respectively.
 

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