vascular sheath

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• vascular bundle — n. Bot. an isolated unit of the conducting system of vascular plants, consisting of xylem and phloem, frequently with other interspersed cells or a sheath of thick walled cells …   English World dictionary

• Vascular bundle — A vascular bundle is a part of the transport system in vascular plants. The transport itself happens in vascular tissue, which exists in two forms: xylem and phloem. Both these tissues are present in a vascular bundle, which in addition will… …   Wikipedia

• sheath — 1. Any enveloping structure, such as the membranous covering of a muscle, nerve, or blood vessel. Any sheathlike structure. SYN: vagina (1). 2. The prepuce of male animals, especially of the horse. 3. A specially designed tu …   Medical dictionary

• vascular bundle — A strand of tissue containing primary xylem and primary phloem (and procambium if present) and frequently enclosed by a bundle sheath of parenchyma or fibres …   Glossary of Biotechnology

• Mynx vascular closure device — The Mynx Vascular Closure Device is an extravascular vascular closure device (VCD) whose deployment system is designed to minimize the discomfort commonly associated with closing the small hole in the artery following a catheterization procedure …   Wikipedia

• Optic nerve sheath meningioma — Radiation treatment of ONSM MRI of a patient with ONSM …   Wikipedia

• bundle sheath — noun : a compact layer of commonly parenchymatous cells forming a sheath around a vascular bundle …   Useful english dictionary

• pseudoglioma — Any intraocular opacity liable to be mistaken for retinoblastoma. * * * pseu·do·gli·o·ma glī ō mə, glē n, pl mas also ma·ta mət ə an inflammatory condition of the eye which resembles glioma of the retina and is marked by a circumscribed… …   Medical dictionary

• List of cutaneous conditions — This is an incomplete list, which may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries. See also: Cutaneous conditions, Category:Cutaneous conditions, and ICD 10… …   Wikipedia

• layer — A sheet of one substance lying on another and distinguished from it by a difference in texture or color or by not being continuous with it. SEE ALSO: stratum, lamina. SYN: panniculus. ameloblastic l. the internal l. of the enamel organ. SYN: enam …   Medical dictionary

• plant development — Introduction       a multiphasic process in which two distinct forms succeed each other in alternating generations. One form, created by the union of sexual cells (gametes (gamete)), contains two sets of similar chromosomes (diploid). At sexual… …   Universalium