VEINS Meaning and
Definition
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Veins are defined as tubular structures that form part of the circulatory system and are responsible for carrying oxygen-depleted blood towards the heart. They are part of the blood vessel system, which also includes arteries and capillaries. Veins are usually thin-walled and have a larger diameter compared to arteries. Their composition consists of three main layers: the tunica intima, tunica media, and tunica externa.
Veins play a crucial role in the transportation of blood throughout the body. They collect the deoxygenated blood from the body tissues and deliver it to the heart to be reoxygenated. Unlike arteries, which rely on the pumping function of the heart to propel blood forward, veins rely primarily on the action of skeletal muscles to help push blood back to the heart. This is achieved through a system of one-way valves inside the vein walls, preventing backflow and facilitating blood flow towards the heart.
Veins are distributed extensively throughout the body, forming an intricate network. The veins close to the surface of the skin are called superficial veins, while those found deep within the muscles are referred to as deep veins. Superficial veins can sometimes become visible or enlarged, resulting in conditions like varicose veins. In certain medical procedures, veins are accessed through puncturing the skin with a needle to draw blood samples or administer medications intravenously.
In summary, veins are the blood vessels responsible for returning deoxygenated blood back to the heart. They rely on the contraction of skeletal muscles and the presence of one-way valves to facilitate blood flow. Without veins, the circulatory system would not be able to supply oxygen to various body tissues and organs.
Top Common Misspellings for VEINS *
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Other Common Misspellings for VEINS
Etymology of VEINS
The word "veins" comes from the Latin word "vena", which referred to a blood vessel or a channel. It originally derived from the Proto-Indo-European root "*wenh₁-", meaning "to wind" or "to turn". The word "veins" entered the English language in the 14th century, referring specifically to the blood vessels that carry blood towards the heart.
Conjugate verb Veins
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