One of the parts produced by the splitting of a capsule or pod when ripe.
One of the parts into which a dehiscent fruit splits.
One of the pieces into which a pod splits.
The part of a fruit, covering the seeds, that opens or falls off.
A structure that permits flow of fluid in one direction only.
A flap which opens and closes to allow liquid to pass in one direction only, e.g. in the heart, blood vessels or lymphatic vessels.
Structure, usually a flap or fold of tissue, found in some tubes and tubular organs that restricts the flow of fluid in them in one direction only. Valves are important structures in the heart, veins, and lymph vessels.
A structure in some body parts that allows fluid to flow in one direction. Valves are important to the function of the heart, the veins, and the lymphatic system. Valves consist of cusps, or flaps, that fasten to the walls of the body part. When blood or lymphatic fluid flows through the valves in the proper direction, the cusps stay open; if the fluid flow is reversed, the cusps become filled with liquid and expand to block the backflow.
Membranous folds that open to allow blood to flow into the heart’s chambers, then close to prevent backflow.
A structure found in some tubular organs or parts that restricts the flow of fluid within them to one direction only. Valves are important structures in the heart, veins, and lymphatic vessels. Such a valve consists of two or three cusps fastened like pockets to the walls of the vessel. Blood flowing in the right direction flattens the cusps to the walls, but when flow is reversed the cusps become filled with blood or lymph and dilate to block the opening.
These cup-like structures are found in the heart, veins, and lymphatic vessels; they ensure that the circulation of the blood and lymph goes always in one direction.
Any of various membranous structures in a hollow organ or passage that temporarily close to permit the flow of fluid in one direction only.
Structures that temporarily close a passage or permit blood flow in only one direction.
The heart consists of flaps, also known as leaflets, made of tissue that are situated within the passages connecting the upper and lower chambers of the heart. These flaps play a crucial role in ensuring proper blood flow and maintaining the efficient functioning of the heart.
A mechanism that permits the flow of liquid or semi-liquid substances through a tube or channel in one direction while preventing backward flow, or reflux, in the opposite direction. Such valves are crucial elements in the circulatory system, specifically at the outlets of heart chambers and within veins. Similar small valves are also present in the vessels comprising the lymphatic system.