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What is a "vein"?
A vein is a type of blood vessel that carries deoxygenated blood from the body's tissues back to the heart. Veins have thinner walls compared to arteries and often have valves to prevent the backward flow of blood. They play a crucial role in the circulatory system, facilitating the return of blood to the heart for oxygenation. Veins are distributed throughout the body, working in coordination with arteries to maintain proper blood flow and ensure the efficient exchange of gases, nutrients, and waste products between the tissues and the cardiovascular system.
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What is a "vein"?
A vein is one of the rigid, tubular structures that run through the wings of insects, providing support and rigidity. These veins are made of a chitinous material and help to maintain the shape and structure of the wing during flight. Veins in insect wings are arranged in a complex pattern, forming a network that strengthens the delicate wing membrane. They serve as channels for the flow of hemolymph, the insect equivalent of blood, delivering nutrients and oxygen to the wing tissues. The arrangement and number of veins can vary across insect species and play a crucial role in determining wing shape, strength, and functionality. The veins of an insect wing are an integral component of its flight apparatus, contributing to the insect's ability to maneuver, glide, and maintain stability while in the air.
a distinctive style or manner
a layer of ore between layers of rock
any of the vascular bundles or ribs that form the branching framework of conducting and supporting tissues in a leaf or other plant organ
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