Chordae tendineae
Chordae Tendineae
Chordae tendineae (pronounced: kor-dee ten-din-ee-ay) are fibrous cords of tissue that connect the papillary muscles to the tricuspid valve and the mitral valve in the heart. The term "chordae tendineae" is derived from the Latin words "chorda" meaning cord, and "tendineae" meaning of the tendons.
Function
The primary function of the chordae tendineae is to prevent the inversion or prolapse of these valves on systole (or the contraction phase of the heartbeat), ensuring the one-way flow of blood from the atria to the ventricles.
Structure
The chordae tendineae are attached to the papillary muscles and the lower ventricular surfaces. They are made up of collagen, elastin, and endothelium, which give them their strength and flexibility.
Related Terms
- Papillary muscles: These 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.
- Tricuspid valve: This is the valve that separates the right atrium from the right ventricle and prevents backflow of blood to the right atrium.
- Mitral valve: Also known as the bicuspid valve, it separates the left atrium from the left ventricle and prevents the backflow of blood to the left atrium.
- Atria: These are the two upper chambers of the heart that receive blood from the veins and then transfer it to the ventricles.
- Ventricles: These are the two lower chambers of the heart that receive blood from the atria and then pump it out to the body.
External links
- Medical encyclopedia article on Chordae tendineae
- Wikipedia's article - Chordae tendineae
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