Leaflets
Leaflets (Medicine)
Leaflets (pronounced: /ˈliːflɪts/) are an integral part of the human anatomy, specifically in the cardiovascular system. They are thin, flat structures found in the heart valves, which open and close to regulate the flow of blood in one direction.
Etymology
The term 'leaflet' is derived from the Old English 'lēaf' and 'flēot', which means 'a small flat flowing structure'. In the medical context, it was first used in the 18th century to describe the flaps of the heart valves due to their resemblance to the leaves of a book.
Function
Leaflets are crucial in maintaining the unidirectional flow of blood in the heart. They open to allow blood flow and close to prevent backflow. This function is vital in the cardiac cycle, ensuring that blood is efficiently pumped throughout the body.
Related Terms
- Heart Valves: These are structures in the heart that include leaflets. They ensure the unidirectional flow of blood in the heart.
- Cardiac Cycle: This is the sequence of events that occur when the heart beats. The opening and closing of leaflets are crucial in this process.
- Cardiovascular System: This is the system of the body that the heart and the leaflets are part of. It is responsible for pumping and circulating blood throughout the body.
Diseases and Conditions
Leaflets can be affected by various diseases and conditions, such as valvular heart disease, which can lead to complications like heart failure. Treatment options include medication, valve repair, or valve replacement.
External links
- Medical encyclopedia article on Leaflets
- Wikipedia's article - Leaflets
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