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vein in Biological Definition

Leaf

... the leaflets are arranged along a secondary vein that is one of several branching off the rachis ... called a pinnule . The pinnules on one secondary vein are called pinna ; e.g. Albizia (silk ... penniveined; the leaf has usually one main vein (called the mid-vein ), with veinlets , smaller ...

Liver

... vessels: the hepatic artery and the portal vein . The hepatic artery normally comes off the celiac trunk . The portal vein brings venous blood from the digestive tract, so ... area where the common bile duct , portal vein , and hepatic artery enter the liver is the ...

Kidney

... an opening, called the hilus, which admits the renal artery , the renal vein , nerves , and the ureter . Organization The outermost portion ... The left kidney receives about 60% of the renal bloodflow. renal vein : The filtered blood returns to circulation through the renal veins which ...

Anatomy

... Gastrointestinal tract Hair Exoskeleton Lip Nerve Peritoneum Serous membrane Skeleton Skull Spinal cord vein See also List of anatomical topics List of human anatomical features Important publications in anatomy History of ...

C4 carbon fixation

... , a simple organic compound that gives up its CO 2 to the Calvin cycle after being shipped off to bundle sheath cells surrounding a nearby vein . After losing the CO 2 , it becomes pyruvate , and can be phosphorylated into PEP at the cost of a phosphorus group and one ATP . It can then ...

Dialysis

... sitting blood pressures are taken. Temperature is taken. Access is setup. For patients with a fistula (a surgical modification to an arm or leg vein to make it more robust, and therefore usable for high capacity blood movement required by dialysis) this means inserting two large gauge needles into ...

Glucose

... ( polysaccharides ). The older name dextrose arose because a solution of D -glucose rotates polarised light towards the right. In the same vein D - fructose was called "levulose" because a solution of levulose rotates polarised light to the left. Contents ...

Insulin

... subcutaneous bolus dosage of only insulin is given instead of the pancreas releasing insulin and C-peptide gradually and directly into the portal vein it is simply a nuisance for patients to inject themselves once or several times a day it may be dangerous in the case of mistake (most ...

Stem cell

... blood cells before being stored in liquid nitrogen for later use, at which point it is thawed, washed of the cryoprotectant, and injected through a vein of the patient. This kind of treatment, where the stem cells are collected from another donor, is called allogeneic treatment. When the cells are ...

Virus classification

... Rubella virus Family Tombusviridae Family Tymoviridae Unassigned genera Genus Benyvirus ; type species: Beet necrotic yellow vein virus Genus Cheravirus ; type species: Cherry rasp leaf virus Genus Furovirus ; type species: Soil-borne wheat mosaic virus Genus ...
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