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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. Bachmann's bundle - Wikipedia

   en.wikipedia.org/wiki/Bachmann's_bundle

   Bachmann's bundle receives its blood supply from the sinoatrial nodal artery (right, left or both). [4]Besides Bachmann's bundle, the other three conduction tracts that constitute the atrial conduction system are known as the anterior, middle, and posterior tracts, which run from the sinoatrial node to the atrioventricular node, converging in the region near the coronary sinus.

4. 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.

5. Fossa ovalis (heart) - Wikipedia

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

   This change in pressure pushes the septum primum against the atrial septum, closing the foramen. [1] The septum primum and atrial septum eventually fuse together to form a complete seal, leaving a depression called the fossa ovalis. By age two, about 75% of people have a completely sealed fossa ovalis.

6. Crista dividens - Wikipedia

   en.wikipedia.org/wiki/Crista_dividens

   The crista dividens is located on the inferior edge of the interatrial septum and faces the opening of the IVC. As blood enters the heart from the IVC, it hits the crista dividens and is divided into two streams, with one stream entering the right atrium and the other entering the left atrium .

7. Atrioventricular node - Wikipedia

   en.wikipedia.org/wiki/Atrioventricular_node

   The blood supply of the AV node is from the atrioventricular nodal branch.The origin of this artery is most commonly (80–90% of hearts) a branch of the right coronary artery, with the remainder originating from the left circumflex artery.

8. Today’s NYT ‘Strands’ Hints, Spangram and Answers for ...

   www.aol.com/today-nyt-strands-hints-spangram...

   In today's puzzle, there are six theme words to find (including the spangram). Hint: The first one can be found in the top-half of the board. Here are the first two letters for each word: AL. YE ...

9. Bundle of His - Wikipedia

   en.wikipedia.org/wiki/Bundle_of_His

   The bundle of His (BH) [1]: 58 or His bundle (HB) [1]: 232 (/ h ɪ s / "hiss" [2]) is a collection of heart muscle cells specialized for electrical conduction.As part of the electrical conduction system of the heart, it transmits the electrical impulses from the atrioventricular node (located between the atria and the ventricles) to the point of the apex of the fascicular branches via the ...