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  • Right, and left atria are separated by means of a thin septum called the  Option: 1 Interventricu

Right, and left atria are separated by means of a thin septum called the

 

Option: 1

Interventricular septum

 


Option: 2

Left auriculoventricular septum

 


Option: 3

Interatrial septum

 


Option: 4

Right auriculo ventricular septum

 


Answers (1)

best_answer

 

 

 

Atria

  • This part is vertically divisible into right and left atria having thin walls
  • The left atria is smaller than the right atria
  • Each atria possess an appendage called auricle which increases the surface area of atrium.
  • Each atria extends behind into a swollen flap i.e. the auricular appendix.it slightly covers the ventricle of each side
  • Right, and left atria are separated by means of a thin septum called the interatrial septum or interauricular septum to prevent the mixing of oxygenated and deoxygenated blood.
  • An oval depression called fossa ovalis is found in the right atrium of the heart, at the level of the interatrial septum.
  • The fossa ovalis is the remnant of a thin fibrous sheet that covers the foramen ovale during foetal development.
  • The internal lining of the atrial wall forms a network of low muscular ridges called musculi pectinati 
  • The superior vena cava, inferior vena cava and coronary sinus open into the right atrium
  • Superior vena cava carries blood from the body’s upper region while inferior vena cava carries blood from the body’s lower region - 
  • Coronary sinus carries the majority of blood from the heart itself 
  • Right atrium receives deoxygenated blood  while left atrium receives oxygenated blood from the lungs (through two pairs of pulmonary veins)

- 

 

Right, and left atria are separated by means of a thin septum called the interatrial septum or interauricular septum to prevent the mixing of oxygenated and deoxygenated blood. Hence, the correct answer is option c.

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avinash.dongre

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