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प्रश्न
What is meant by the term 'double circulation' of blood in mammals? What is diastole?
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उत्तर
Blood flows twice in the heart before it completes one full cycle. This process of blood circulation in the human body is called double circulation.
The expansion or relaxation phase of the atria is called a diastole.
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.
Mention the exact location of the Pulmonary semilunar valve
What is meant by human circulatory system? Name the organs of the circulatory system in humans.
Give reason for the following:
Atrial wall is less muscular than the ventricular wall.
During surgical operations or during accidents, the patient may be given blood from outside to save his life. What is the technical name of this process? Briefly explain the precautions to be taken in this process.
Multiple choice questions. Tick ( ✓ ) the correct choice:
Human heart has
Define the Circulatory system.
Which of the following is TRUE regarding leucocytosis?
Circulation is carried out by ______ in higher animals.
Ventricles have ______ walls when compared with those of auricles.
