Frank solutions for Class 10 Biology chapter 7 - Circulatory System

Explain the following:
Why is the SA node called the pace-maker of the heart?

Explain the following:
Why is there no mixing of deoxygenated and oxygenated blood in the human heart normally?

Explain the following:
Why is the closed circulatory system more efficient than the open system?

Explain the following:
Why does the left ventricle possess a thicker wall than the right ventricle?

Name the following:
The soluble protein present in the blood plasma responsible for clotting.

Name the following:
The process by which leucocytes engulf and destroy bacteria.

Name the following:
The iron containing pigment in the erythrocytes.

Name the following:
The phase of the cardiac cycle in which auricle contracts.

Name the following:
The study of blood vascular and lymphatic system.

Name the following:
The inflammation of pericardium.

Name the following:
The valve of right auriculo-ventricular aperture.

Name the following:
In embryological stage right and left auricles are communicated by.

Name the following:
Abnormal rise in RBC number.

Name the following:
The first heart sound.

Select the odd one in the following:
RBC, WBC, Blood platelets, Histone.

Select the odd one in the following:
Tricuspid, Bicuspid, Semilunar, Foramen ovales.

Select the odd one in the following:
Artery, Vein, Capillary, Nerve.

Select the odd one in the following:
Monocytes, Lymphocytes, Basophils, RBC

Select the odd one in the following:
Prothrombin, Thrombin, Fibrinogen, Albumin.

Refer to fig. 7.3 and answer the following questions: 

(i) Impure blood is received by 
(ii) Which chamber has thickest wall 
(iii) Function of bicuspid value 
(iv) Function of tricuspid value 

Label the following diagram :

Match the terms given in column I with terms in Column II: 

Choose the correct answer:
How much blood is present in an average person?

Choose the correct answer:
 Which chamber of the heart has the thickest wall?

Choose the correct answer:
Exchange of material between blood and interstitial fluid occurs only at the ________

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Both erythrocytes and leucocytes form in the _________

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The life-span of RBC is _________

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The mammalian heart is ___________

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In mammals the opening of post caval in the right auricle is guarded by _________

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Bundle of 'His' is found in ___________

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The rate of heart beat per minute in a normal man is ____________

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Which of the following engulfs pathogen rapidly?

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The amount of water present in blood plasma is __________

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English physician who discovered blood circulation was ___________

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Which of the following is termed as the 'graveyard' of R.B.C.?

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The E.C.G. is used to detect ____________

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Universal blood donor group is ___________