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  2. Interatrial septum - Wikipedia

    en.wikipedia.org/wiki/Interatrial_septum

    The interatrial septum is a septum that lies between the left atrium and right atrium of the human heart. The interatrial septum lies at angle of 65 degrees from right posterior to left anterior because right atrium is located at the right side of the body while left atrium is located at the left side of the body. [1]

  3. Atrioventricular node - Wikipedia

    en.wikipedia.org/wiki/Atrioventricular_node

    The AV node lies at the lower back section of the interatrial septum near the opening of the coronary sinus, which conducts the normal electrical impulse from the atria to the ventricles. The AV node is quite compact (~1 x 3 x 5 mm). [2]

  4. Fossa ovalis (heart) - Wikipedia

    en.wikipedia.org/wiki/Fossa_ovalis_(heart)

    The major changes that are made by the body occur at the first breath (in the case of heart and lung functions) and up to weeks after birth (such as the liver's enzyme synthesis). The foramen ovale becomes the fossa ovalis as the foramen closes while edge of the septum secundum in right atrium becomes the anulus ovalis, so the depression ...

  5. Bachmann's bundle - Wikipedia

    en.wikipedia.org/wiki/Bachmann's_bundle

    In the heart's conduction system, Bachmann's bundle (also called the Bachmann bundle or the interatrial band) [1] is a branch of the anterior internodal tract that resides on the inner wall of the left atrium. It is a broad band of cardiac muscle that passes from the right atrium, between the superior vena cava and the ascending aorta. [2]

  6. Atrium (heart) - Wikipedia

    en.wikipedia.org/wiki/Atrium_(heart)

    The interatrial septum has an opening in the right atrium, the foramen ovale, which provides access to the left atrium; this connects the two chambers, which is essential for fetal blood circulation. At birth, when the first breath is taken fetal blood flow is reversed to travel through the lungs.

  7. Anatomy of the human heart - Wikipedia

    en.wikipedia.org/wiki/Anatomy_of_the_human_heart

    The heart is a muscular organ situated in the mediastinum.It consists of four chambers, four valves, two main arteries (the coronary arteries), and the conduction system. The left and right sides of the heart have different functions: the right side receives de-oxygenated blood through the superior and inferior venae cavae and pumps blood to the lungs through the pulmonary artery, and the left ...

  8. Bundle of His - Wikipedia

    en.wikipedia.org/wiki/Bundle_of_His

    Function [ edit ] The bundle of His is an important part of the electrical conduction system of the heart , as it transmits impulses from the atrioventricular node, located at the anterior-inferior end of the interatrial septum , to the ventricles of the heart.

  9. Primary interatrial foramen - Wikipedia

    en.wikipedia.org/wiki/Primary_interatrial_foramen

    The septum primum, a septum which grows down to separate the primitive atrium into the left atrium and right atrium, grows in size over the course of heart development.The primary interatrial foramen is the gap between the septum primum and the septum intermedium, which gets progressively smaller until it closes.