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Introduction of an inactive or weakened pathogen into the body in order to stimulate an immune reaction that will allow the body to respond quickly to the pathogen if real infection ever occurs. A preparation eliciting an immune response when injected into the body. varix /VAR-icks/ (pl varices /VAR-i-seez/) A varicose vein. In plant and animal cells, organelles that remove waste and store food. (1) a mucomembranous, thin-walled passage forming the birth canal; the passageway leading out from the uterus to the exterior of the body; the birth canal; (2) any sheathlike part. varicula /vah-RIK-yoo-lə/ (pl variculae /vah-RIK-yoo-lī/) A small varicose vein. Containing or composed of conductive tubes, arteries, or veins — vascularized /VASK-yə-ler-īzd/ adj. The central core of the vascular tissue in a plant root. Sunburn is a reaction to DNA damage caused by UV light. An inflorescence in which the flower stalks (pedicels) radiate from a common point. The hoselike structure connecting the placenta to the embryo or fetus; contains the umbilical artery and vein. The navel (or umbilicus) marks the point of its former attachment. MOLECULAR STRUCTURE undulipodium (pl undulipodia) /ƏN-dyə-lə-PODE-ee-əm/ n. The muscular reservoir for urine, which it collects from the ureters, and discharges from the body through the urethra. The waste fluid produced by the kidneys and stored in the urinary bladder prior to excretion. Of or pertaining to the reproductive and urinary organs. The study and treatment of disorders of the urogenital organs. The genus to which the brown bear, Ursus arctos, and the cave bear, Ursus spelaeus belong.
PICTURE1 | PICTURE 2 ulnocarpal /ƏL-nō-CARP-əl/ adj. Where the undulipodium attaches to the cell there is a basal body called the kinetosome which is connected to the axoneme with motor proteins. MOLECULAR STRUCTURE urea cycle See: ornithine cycle. Either of the tubes leading from the kidneys to the bladder. Cells present in blood, also known as leukocytes, that play a role in the immune system. PICTURE1 | PICTURE2 | PICTURE3 xiphocostal /ZĪ-fō-CAWST-əl/ adj. An extension of the sternum protruding caudally between the two halves of the rib cage. In this method, x-rays are passed through the substance under analysis and then, on the basis of the resulting patterns of diffraction, inferences are made about its structure. A vector, constructed from yeast DNA, used to clone large DNA fragments. A hybrid resulting from hybridization of an ass with a zebra. (also zorse) A hybrid resulting from hybridization of an horse with a zebra.
The longer of the two bones of the forearm; it connects with the wrist on the side away from the thumb. An undulipodium contains cytoplasm and a ropelike structure composed of microtubules known as an axoneme. The half-life of U-238 is about 4.47 billion years and that of U-235 is 704 million years, which make them useful for dating geological strata (the methods used for this purpose are uranium-thorium dating, uranium-lead dating, and uranium-uranium dating). It is the primary nitrogenous component of urine in mammals and amphibians. It holds and nourishes the developing embryo and fetus.