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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.

varicose veins /VAIR-ə-kōs/ Enlarged, often painful, veins, usually found on the legs. Plants with vascular tissue (i.e., all plants other than mosses and their relatives). Plant tissue, composed of phloem and xylem, that functions in fluid conduction. The sperm-bearing tube leading from the epididymis to the urethra. An operation severing the vas deferens for the purpose of contraception. (1) an animal that transmits disease from an infected individual to some other, uninfected individual (2) cloning vector.

Microbes Microbes and washing hands Size of Microbes Growth rate of microbes Prevention of infection during operations Microbes sterilization - Control of infection in operating theatre Microbes and spots on your face The following lessons cover some of the topics for the Edexcel IGCSE Biology The Nature and Variety of Living Organism Characteristics of living organism Variety of living organism Pathogens: fungi, bacteria, protoctists or viruses.

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.

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.

vessel elements Wide cells that join end-to-end to form water-carrying tubes in angiosperms.

The vestibule lies between the cochlea and the semicircular canals. A fluid-conducting tube or duct within a living organism. A genus of bacteria including the causative agents of cholera (Vibrio comma) and brucellosis (Vibrio fetus). Short, filamentous processes that occur on certain membranous surfaces such as the interior of the intestines or the surface of the chorion.