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Veins in Biological Definition

Blood

... contact with oxygen. Blood is never blue , but veins appear blue because light is diffused by skin ... reflection. From a physiological perspective, veins and arteries appear similar when skin is ... . It then returns to the heart through the veins . See circulatory system for a more detailed ...

Leaf

... 1.1 Epidermis 1.2 Mesophyll 1.3 veins 2 Leaf types, arrangements, and forms ... called the mesophyll An arrangement of veins (the vascular tissue). Epidermis The ... by curtailing chlorophyll production. veins The ...

Lung

... artery and, after having been oxygenated, returns via the pulmonary veins . Location The lungs are located inside the thoracic cavity , ... in arterial blood filter out small blood clots formed in the systemic veins serve as a physical layer of soft, shock -absorbent protection for ...

Dialysis

... time to setup and mature (anywhere between 5 weeks to 15 weeks). For other patients, access may be via a catheter installed to connect to large veins in the chest. (This means no needles, but there are other severe downsides to a catheter). There are some other arrangements that can be made as ...

Klinefelter's syndrome

... have some degree of language impairment as well. The syndrome is associated with an increased risk of breast cancer , pulmonary disease , varicose veins , and osteoporosis . The condition was identified in 1942 by Dr. Harry Klinefelter in Boston . The cause was not found until the 1950s. The ...

Kidney

... kidneys. The left kidney receives about 60% of the renal bloodflow. renal vein : The filtered blood returns to circulation through the renal veins which join into the inferior vena cava . renal pelvis : Basically just a funnel , the renal pelvis accepts the urine and channels it out of ...

Liver

... portal vein brings venous blood from the digestive tract, so that the liver can process the nutrients and toxins extracted from food. The hepatic veins drain directly into the inferior vena cava . The bile produced in the liver is collected in bile capillaries which merge to form bile ducts. ...

Marcello Malpighi

... . Later he falsely concluded that plants had similar tubules. He was the first to see capillaries and discovered the link between arteries and veins that had eluded William Harvey . Malpighi is regarded as the founder of microscopic anatomy and the first histologist . Many microscopic ...
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