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प्रश्न
Answer the following:
What is specific in the heart of crocodiles among reptilians?
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उत्तर
Crocodiles have a four-chambered heart (2 atria and 2 ventricles) with no mixing of oxygenated and deoxygenated blood, whereas reptiles have a three-chambered heart (2 atria and 1 ventricle).
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संबंधित प्रश्न
Write the differences between open and closed system of circulation
Sino-atrial node is called the pacemaker of our heart. Why?
What is the significance of atrio-ventricular node and atrio-ventricular bundle in the functioning of heart?
A patient’s chart reveals that he has a cardiac output of 7500 mL per minute and a stroke volume of 50 mL. What is his pulse rate (in beats/min)
Right ventricular wall is thinner than the left ventricular wall. Why?
What are the heart sounds? When and how are these sounds produced?
Select the correct biological term.
Destroyed in the liver and spleen after circulating in the blood for four months.
Select the correct biological term.
The substances which gives red cells their colour.
Which among the followings is correct during each cardiac cycle?
The cardiac impulse is initiated and conducted further upto ventricle. The correct sequence of conduction of impulse is ______.
Read the following statements and choose the correct option
Statement 1: Atria receive blood from all parts of the body which subsequently flows to ventricles.
Statement 2: Action potential generated at sino-atrial node passes from atria to ventricles.
Define the following terms and give their location?
Purkinje fibre
The walls of ventricles are much thicker than atria. Explain.
Write the features that distinguish between the two.
Open and Closed circulatory system
Write the features that distinguish between the two.
Sino-atrial node and Atrio-ventricular node
Answer the following:
Which part of heart is responsible for initating and maintaining its rhythmic activity?
In the diagrammatic presentation of heart given below, mark and label, SAN, AVN, AV bundles, bundle of His and Purkinje fibres.
