1. A specialized network of vessels for the circulation of fluids throughout the body tissues of an animal. All animals, apart from simple invertebrate groups, possess a blood vascular system, which enables the passage of respiratory gases, nutrients, excretory products, and other metabolites into and out of the cells. In vertebrates it consists of a muscular heart, which pumps blood through major blood vessels (arteries) into increasingly finer branches until in the capillaries it is in intimate contact with tissues. It then returns to the heart via another network of vessels (the veins). This circulation also enables a stable internal environment for tissue function (see homeostasis), the transmission of chemical messengers (hormones) around the body, and a means of defending the body against pathogens and damage via the immune system. A water vascular system is characteristic of the Echinodermata.
2. The system of vascular tissue in plants.
"vascular system." A Dictionary of Biology. . Encyclopedia.com. (April 21, 2019). https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/vascular-system-0
"vascular system." A Dictionary of Biology. . Retrieved April 21, 2019 from Encyclopedia.com: https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/vascular-system-0
Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).
Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.
Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:
Modern Language Association
The Chicago Manual of Style
American Psychological Association
- Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
- In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.
"vascular system." A Dictionary of Plant Sciences. . Encyclopedia.com. (April 21, 2019). https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/vascular-system
"vascular system." A Dictionary of Plant Sciences. . Retrieved April 21, 2019 from Encyclopedia.com: https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/vascular-system