Veins

Veins are used medically as points of access to the blood stream, permitting the withdrawal of blood specimens (venipuncture) for testing purposes, and enabling the infusion of fluid, electrolytes, nutrition, and medications.
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veins Thin-walled vessels that carry blood to the heart. Units of the circulatory system that carry blood to the heart.
ventilation The mechanics of breathing in and out through the use of the diaphragm and muscles in the wall of the thoracic cavity.
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veins Blood vessels conducting blood toward the heart in any animal. Also more heavily sclerotized portions of wings of insects, which are remains of lacunae.
velarium Shelf-like extension of the subumbrella edge in cubozoans (phylum Cnidaria).
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Veins draining the upper portion of the body lead to the superior vena cava.
Veins draining the lower part of the body lead to the inferior vena cava.
Both empty into the right atrium.
Link to discussion of the control of the heartbeat.
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Veins
The veins are the vascular tissue of the leaf and are located in the spongy layer of the mesophyll. They are typical examples of pattern formation through ramification.
The veins are made up of: ...
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veins: channels through which fluid flows toward the heart.
vena cava :the major vein in the human heart; pumps oxygen-poor blood into the right atrium.
ventricle: a pumping chamber for blood to exit from the heart.
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veins
Vessels which carry blood back to the heart from the tissues. Veins are thin walled and will collapse if empty. They have a series of one-way valves to prevent blood from flowing backwards.
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Leaf veins -- In monocots, there are usually a number of major leaf veins which run parallel the length of the leaf; in dicots, there are usually numerous auxillary veins which reticulate between the major ones.
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blood vessels (veins) carrying blood from the posterior part of the body to the kidneys. Oxygenated blood is carried to the kidneys by the renal arteries
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
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In col1/kn1 wings, the size of the L3-L4 intervein was 666% smaller that of wild type, whereas the size of the other A interveins (anterior margin to L2 and L2-L3) was unchanged, ...
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azygous vein - one of a system of veins that drain the thoracic and abdominal walls; arises as a continuation of the right ascending lumbar vein and terminates in the superior vena cava
Synonyms: azygos vein, vena azygos
By Wordnet Dictionary ...
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skeletonize. To remove leaf tissue between the veins, leaving the network of veins intact.
soil profile. A vertical section of the soil through all its horizontal layers, extending into the parent material.
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Hemorrhoids dilated or varicose veins in the anal area often due to difficulty passing feces due to a low fiber diet
(hemo = blood; rheo = flow current; -oid = like form) ...
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A closed circulatory system with a heart and branching network of arteries, capilleries, and veins.
carnivore
[L. caro, carnis, flesh + voro, to devour] ...
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[L. vitellus - yolk of an egg]. The embryonic circulatory system supplying blood to the yolk sac via vitelline arteries and its return to embryo through the vitelline veins.
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Adams, A. 2002. Prospecting for gold in genome gulch. The Scientist
16:36-38. Modern-day bioprospectors combine association, functional, and gene expression data to stake their claims in the rich veins of human DNA.
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Photosynthesis occurs within the mesophyll cells in C3 plants, which form a dense layer on the upper surface of the leaf and a spongy layer on the lower surface. Bundle-sheath cells surrounding the veins are not photosynthetic.
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