Chordae Tendineae

Chordae tendineae are fibrous cords that attach to the valves of the heart and prevent them from collapsing into the atria during ventricular contraction. They are necessary for proper heart function and play a crucial role in maintaining blood flow throughout the body.

Strip of Muscle Fibers

The statement "they are strips of muscle fibers" is incorrect. Chordae tendineae are actually composed of collagen fibers, which are strong and flexible. These fibers are arranged in a way that allows them to withstand the force of ventricular contraction without breaking or stretching too much.

Attached to Valves and Papillary Muscles

Chordae tendineae are attached to both the valves and papillary muscles of the heart. The papillary muscles are small muscle masses located in the walls of the ventricles, and they are responsible for controlling the tension on the chordae tendineae. When the ventricles contract, the papillary muscles also contract, pulling on the chordae tendineae and preventing the valves from collapsing into the atria.

Prevent Collapsing of Valves into Atria

The primary function of chordae tendineae is to prevent the valves of the heart from collapsing into the atria during ventricular contraction. This is important because if the valves were to collapse, blood flow would be disrupted and the heart would not be able to pump blood effectively. The chordae tendineae act like guy wires, anchoring the valves in place and providing the necessary support to keep them from collapsing.

Conclusion

In summary, chordae tendineae are fibrous cords that attach to the valves of the heart and prevent them from collapsing into the atria during ventricular contraction. They are composed of collagen fibers, attached to both the valves and papillary muscles, and are crucial for maintaining proper blood flow throughout the body.

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