Segmental organs
Segmental Seg*men"tal, a. 1. Relating to, or being, a segment. [1913 Webster]

2. (Anat. & Zo["o]l.) (a) Of or pertaining to the segments of animals; as, a segmental duct; segmental papill[ae]. (b) Of or pertaining to the segmental organs. [1913 Webster]

{Segmental duct} (Anat.), the primitive duct of the embryonic excretory organs which gives rise to the Wolffian duct and ureter; the pronephric duct.

{Segmental organs}. (a) (Anat.) The embryonic excretory organs of vertebrates, consisting primarily of the segmental tubes and segmental ducts. (b) (Zo["o]l.) The tubular excretory organs, a pair of which often occur in each of several segments in annelids. They serve as renal organs, and often, also, as oviducts and sperm ducts. See Illust. under {Sipunculacea}.

{Segmental tubes} (Anat.), the tubes which primarily open into the segmental duct, some of which become the urinary tubules of the adult. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Segmental — Seg*men tal, a. 1. Relating to, or being, a segment. [1913 Webster] 2. (Anat. & Zo[ o]l.) (a) Of or pertaining to the segments of animals; as, a segmental duct; segmental papill[ae]. (b) Of or pertaining to the segmental organs. [1913 Webster]… …   The Collaborative International Dictionary of English

  • Segmental duct — Segmental Seg*men tal, a. 1. Relating to, or being, a segment. [1913 Webster] 2. (Anat. & Zo[ o]l.) (a) Of or pertaining to the segments of animals; as, a segmental duct; segmental papill[ae]. (b) Of or pertaining to the segmental organs. [1913… …   The Collaborative International Dictionary of English

  • Segmental tubes — Segmental Seg*men tal, a. 1. Relating to, or being, a segment. [1913 Webster] 2. (Anat. & Zo[ o]l.) (a) Of or pertaining to the segments of animals; as, a segmental duct; segmental papill[ae]. (b) Of or pertaining to the segmental organs. [1913… …   The Collaborative International Dictionary of English

  • Segmental analysis (biology) — Segmental analysis is a method of anatomical analysis for describing the connective morphology of the human body. Instead of describing anatomy in terms of spatial relativity, as in the anatomical position method, segmental analysis describes… …   Wikipedia

  • circulation — circulable /serr kyeuh leuh beuhl/, adj. /serr kyeuh lay sheuhn/, n. 1. an act or instance of circulating, moving in a circle or circuit, or flowing. 2. the continuous movement of blood through the heart and blood vessels, which is maintained… …   Universalium

  • annelid — /an l id/, n. 1. any segmented worm of the phylum Annelida, including the earthworms, leeches, and various marine forms. adj. 2. belonging or pertaining to the Annelida. Also, annelidan /euh nel i dn/. [1825 35; see ANNELIDA] * * * Any member of… …   Universalium

  • human embryology — ▪ biology Introduction       the process encompassing the period from the formation of an embryo, through the development of a fetus, to birth.       The human body, like that of most animals, develops from a single cell produced by the union of… …   Universalium

  • Nervous system — Nerve redirects here. For other uses, see Nerve (disambiguation). This article is about the nervous system. For parts of the nervous system commonly called nerves, see Peripheral nerve. Nervous system The Human N …   Wikipedia

  • arthropod — /ahr threuh pod /, n. 1. any invertebrate of the phylum Arthropoda, having a segmented body, jointed limbs, and usually a chitinous shell that undergoes moltings, including the insects, spiders and other arachnids, crustaceans, and myriapods. adj …   Universalium

  • animal development — Introduction  the processes that lead eventually to the formation of a new animal starting from cells derived from one or more parent individuals. Development thus occurs following the process by which a new generation of organisms is produced by …   Universalium

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”