Anatomy of the heart - Chambers and associated great vessels

6 important questions on Anatomy of the heart - Chambers and associated great vessels

Composition of the left atrium

1. Mostly smooth
2. Only pectinate muscle in auricle

What are pectinate muscles?

Bundles of muscles tissue, look like teeth of a comb.

What is the fossa ovalis?

Marks the spot where an opening existed in the fetal heart.
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Which veins enter the right atrium?

1. Superior vena cava: from body regions superior to the diaphragm
2. Inferior vena cava: from body regions below the diaphragm
3. Coronary sinus: from the mycardium

What are the trabeculae carneae?

Irregular ridges of muscle. They mark the internal walls of the ventricular chambers.

What are papillary muscles?

Muscle bundles which play a role in valve function, prevents leakage through valves.

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