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प्रश्न
Give reason for the following:
Atrial wall is less muscular than the ventricular wall.
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उत्तर
Atrial wall is less muscular than the ventricular wall because the major function of atria is
to receive blood from the body and pump in into very next ventricles. While the ventricles
pump the blood out of the heart. Right ventricle to the lungs and the left ventricle to all the
body parts.
संबंधित प्रश्न
The diagram given below represents a section of the human heart. Answer the questions that follow :
(i) Which parts of heart are in the diastolic phase? Give a reason to support your answer.
(ii) Label the parts numbered 1 and 2 in the diagram. What type of blood flows through them?
(iii) What causes the heart sounds ‘LUBB’ and ‘DUP’?
(iv) Name the blood vessels that supply oxygenated blood to the heart muscles.
(v) Draw neat labelled diagrams of a cross section of an artery and a vein.
Explain Diapedesis.
Why do people have a common belief that the heart is located on the left side of the chest?
Draw a neat and labelled diagram.
Internal structure of the heart.
Production of RBCs occurs in ______.
Fill in the blanks with suitable words given below:
The two lower chambers of the heart are called ______.
Describe the functions of the: Blood
The endocrine glands produce chemical substances called ____
Given below are four statements regarding human blood circulatory system:-
- Arteries are thick walled and have narrow lumen as compared to veins.
- Angina is acute chest pain when the blood circulation to the brain is reduced.
- Persons with blood group AB can donate blood to any person with any blood group under ABO system.
- Calcium ions play a very important role in blood clotting.
Which two of the above statements are correct?
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Can you answer why the pulmonary artery shown in Fig. is blue in colour?
