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English: Heart diagram with labels in English. Blue components indicate de-oxygenated blood pathways and red components indicate oxygenated blood pathways ...
Isolated heart conduction system showing atrioventricular node. The AV node receives two inputs from the right atrium: posteriorly, via the crista terminalis, and anteriorly, via the interatrial septum. [8] Contraction of heart muscle cells requires depolarization and repolarization of their cell membranes. Movement of ions across cell ...
This is the rabbit's way of marking their territory or possessions for other rabbits to recognize by depositing scent gland secretions. Rabbits who have bonded will respect each other's smell, which indicates a territorial border. [140] Rabbits also have scent glands that produce a strong-smelling waxy substance near their anuses. [141]
The papillary muscles are muscles located in the ventricles of the heart. They attach to the cusps of the atrioventricular valves (also known as the mitral and tricuspid valves) via the chordae tendineae and contract to prevent inversion or prolapse of these valves on systole (or ventricular contraction).
Diagram of the human heart, created by Wapcaplet in Sodipodi. Cropped by ~~~ to remove white space (this cropping is not the same as Wapcaplet's original crop). == See also == * Image:Diagram of the human heart.svg - original
Right heart anatomy, right ventricle seen on right of illustration Humans have a four-chambered heart consisting of the right and left atrium, and the right and left ventricle. The atria are the two upper chambers which pump blood to the two lower ventricles.
The crista terminalis (also known as the terminal crest, [citation needed] or crista terminalis of His [1]) is a vertical ridge on the [2]: 56 posterolateral [3] inner surface of the adult right atrium extending between the superior vena cava, and the inferior vena cava.
Sinus node dysfunction also known as sick sinus syndrome is a group of irregular heartbeat conditions caused by faulty electrical signals of the heart. When the heart's sinoatrial node is defective, the heart's rhythms become abnormal—typically too slow or exhibiting pauses in its function or a combination, and very rarely faster than normal ...