Transportation In Animals And Plants - Class 7 Biology - Extra Questions

What are the upper chambers of the heart called? Are they the auricles or the atria?



Which chambers are the receiving chambers of the heart?



What are the names of three layers of the heart wall?



What are the different cardiac muscle layer of the heart?



Arteries are the blood vessels that have elastic walls and _____ are the blood vessels with non-elastic thin walls.



In human heart, blood passes through the heart twice during one cardiac cycle. This type of circulation is known as 



Explain the flow of blood in heart.



John prepared stethoscope with paper cup and plastic tube. Write down the procedure of preparation.



What are the components of blood?



Very short answer type.
What are the heart sounds heard through the stethoscope when placed on the chest? What produces them?



Name the organ which is located in the chest cavity with its lower tip slightly tilted towards the left. 



How do plants get nutrients?



Name the component of blood which transports oxygen to different parts of the body.



What is blood? Describe the various components of blood.



Why did the bleeding stop?



Observe the given figure and answer the given question.
Name the instrument.

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Veins have valves which allow blood to flow only in one direction. Arteries do not have valves. Yet the blood flows in one direction only. Can you explain why? 



Describe the following blood vessels: artery, vein and capillary.



Identify the system.



What are the smallest blood vessels in the human body?



Label all the parts. What is the fluid that accumulates in part 3? Which is the main nitrogenous waste present in it?



Which is the main excretory organ in humans? 



What would be the colour of the wounded area and why? 



Which type of blood cells are responsible for clotting of blood?



What is the advantage of having a four chambered heart?



Very Short Answer.
Write the main function of arteries and veins.



What is the function of cardiac muscles cells?



Look at the figure. Draw another figure of the same set-up as would be observed after a few hours. 
1805234_68e8f0975378433ea5e50dc1c38ba52b.png



Give the technical term for :-
Instrument used to measure heartbeat.



Observe figure and answer the given questions: 
Label the parts A, B and C. 

1805297_9b600b79b71f420989dea5566f7d1bdc.png



Class 7 Biology Extra Questions