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Question
Ventricles have ______ walls when compared with those of auricles.
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Solution
Ventricles have thick muscular walls when compared with those of auricles.
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RELATED QUESTIONS
The blood from the heart is transported to all parts of the body by the ______.
The diagram below represents the human heart in one phase of its function. Study the diagram carefully and answer the questions that follow:

(i) Name the phase.
(ii) Which part of the heart is contracting in this phase? Give a reason to support your answer.
(iii) Name the parts labelled 1 to 4.
(iv) What type of blood flows through ‘2’?
(v) State the function of the part numbered ‘5’.
(vi) Name the membrane that covers the heart.
Given below is a diagram of a human blood smear.
Study the diagram and answer the questions that follow:

a) Name the components numbered ‘1’ to ‘4’
b) Mention two structural differences between the parts ‘1’ and ‘2’.
c) Name the soluble protein found in part ‘4’ which forms insoluble threads during clotting of blood.
d) What is the average lifespan of the component numbered ‘1’ ?
e) Component numbered ‘1’ do not have certain organelles but are very efficient in their function. Explain
Given alongside is a diagram of human heart showing its internal structures. Label the parts marked 1 to 6, and answer the following questions.

- Which type of blood is carried by the blood vessel marked 2?
- Name the main artery which takes the blood from heart to different parts of the body?
- Which chamber of the heart receives deoxygenated blood from the body?
Heart sounds are produced due to ______.
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closure of tricuspid and bicuspid valves
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rushing of blood through valves producing turbulence
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closure of atrioventricular and semilunar valves
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entry of blood into auricles
Name the following:
Any one vein which starts from an organ and ends in another organ besides the heart
Give reason for the following:
Blood flowing away from the stomach and intestines is put into circulation via the liver and
not directly.
Differentiate between:
Red blood cells and White blood cells
Assertion (A): RBCs help in the transport of respiratory gases.
Reason (R): The cytoplasm of RBCs contains the respiratory pigment Haemoglobin.
