Organisations and chambers of the heart

Question 1

what is the role of the right and left auricles? (atrial appendage)

Answer 1

fills with blood before contracting and pumps the blood from atrium to ventricle
they increase the volume and pressure capacity of the atria.

Question 2

what chamber forms the apex of the heart?

Answer 2

right ventricle

Question 3

in utero what was the function of the foramen ovale?

Answer 3

to allow the movement of blood from right atrium to the left atrium.
The higher pressure in the right atrium pushed the blood into the left atrium.
This occurs in utero because the heart starts beating at week 5 however the pulmonary circulation hasn’t formed.

Question 4

in the right ventricle, what is the position of the septomarginal trabeculum?

Answer 4

connects the inter ventricular septum with the anterior wall of the right ventricle.

Question 5

what is the septomarginal trabeculum (moderator band)?

Answer 5

muscular band of heart tissue found in the right ventricle

Question 6

In the right ventricle what is the function of the of septomarginal trabeculum (moderator band?

Answer 6

conveys a portion of the right branch of the atrioventricular bundle
(plays a role in the conducting system of the heart)

Question 7

what is the function of the papillary muscles?

Answer 7

contract to prevent inversion of or prolapse of the valves.

Question 8

what is the function of the chord tendinae?

Answer 8

anchor valves to the papillary muscles