Pectinate muscles
Pectinate Muscles
Pectinate muscles (pronunciation: pek-ti-nate mus-kuls) are parallel ridges in the walls of the heart's atria. They are named for their resemblance to a comb's teeth, which is reflected in their etymology. The term "pectinate" is derived from the Latin word "pecten," meaning "comb."
Etymology
The term "pectinate" comes from the Latin "pecten," which means "comb." This is due to the comb-like appearance of these muscles in the heart's atria. The term "muscle" comes from the Latin "musculus," meaning "little mouse," which is a reference to the appearance and movement of certain muscles.
Function
Pectinate muscles are found in the atria of the heart, specifically in the right atrium and in the left atrial appendage. They contribute to the conduction of electrical impulses and the contraction of the atria, playing a crucial role in the heart's function.
Related Terms
- Atria: The two upper chambers of the heart, which receive blood from the veins and then pump it into the ventricles.
- Heart: The organ that pumps blood throughout the body, supplying oxygen and nutrients to the tissues and removing carbon dioxide and other wastes.
- Cardiac Muscle: A type of muscle tissue that is found only in the heart and is responsible for the heart's ability to pump blood.
- Atrial Appendage: A small pouch in the atria of the heart that can play a role in the development of blood clots in patients with atrial fibrillation.
External links
- Medical encyclopedia article on Pectinate muscles
- Wikipedia's article - Pectinate muscles
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