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Answer the following: What is specific in the heart of crocodiles among reptilians?

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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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पाठ 18: Body Fluids and Circulation - Exercises [पृष्ठ १०६]

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एनसीईआरटी एक्झांप्लर Biology Exemplar [English] Class 11
पाठ 18 Body Fluids and Circulation
Exercises | Q 9. c. | पृष्ठ १०६

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संबंधित प्रश्‍न

Write the differences between open and closed system of circulation


What is the significance of atrio-ventricular node and atrio-ventricular bundle in the functioning of heart?


Conversion of ammonia into uric acid occurs through --------------


At any given time there is more blood in the venous system than that of the arterial system. Which of the following features of the veins allows this?


Distinguish between mitral valve and semi lunar valve.


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.

The substances which gives red cells their colour.


Which among the followings is correct during each cardiac cycle?


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?


Cardiac activities of the heart are regulated by ______.

  1. Nodal tissue
  2. A special neural centre in the medulla oblongata
  3. Adrenal medullary hormones
  4. Adrenal cortical hormones

Choose the correct answer from the options given below:


Following are the stages of pathway for conduction of an action potential through the heart:

  1. AV bundle
  2. Purkinje fibres
  3. AV node
  4. Bundle branches
  5. SA node

Choose the correct sequence of pathway from the options given below:


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