Ambulacrum
Definition
An anatomical formation specific to echinoderms, represented by a groove, a perforated zone, or a radial band along the body, through whose openings the hydraulic (ambulacral) feet protrude. Also, the term can broadly designate the entire water vascular system, being the core structural element that differentiates this class of marine invertebrates within the animal kingdom.
Bilingual Equivalents
- Ambulacrum
- Ambulacra
Grammatical & Source Details
| Inflection Type | Neuter noun, with regular structural plural forms in academic biological nomenclature. |
| Formation | Direct loan from Latin (ambulacrum - avenue, walking place), semantically adapted into modern scientific language. |
| Spelling / Pronunciation | [am.bu.la.ˈkru] |
| Source | International Lexicon of Marine Invertebrates and Morphological Structures |
Contextual Usage Examples
RO: La steaua de mare, fiecare ambulacru pornește de la nivelul gurii și se extinde până la vârful fiecărui braț.
EN: In the starfish, each ambulacrum starts from the mouth level and extends to the tip of each arm.
RO: Lichidul celomic circulă prin acest ambulacru pentru a transporta substanțele nutritive în corp.
EN: The coelomic fluid circulates through this ambulacrum to transport nutrients throughout the body.
RO: Ocluzia unui ambulacru poate paraliza parțial capacitatea de deplasare a organismului marin.
EN: The occlusion of an ambulacrum can partially paralyze the marine organism's ability to move.
Idioms & Phrases
Ambulacru radial / Radial ambulacrum
RO: Canal principal care străbate brațele stelei de mare, distribuind apa către toate ventuzele externe.
EN: Main canal running through the arms of the starfish, distributing water to all external suction cups.
Placă de ambulacru / Ambulacral plate
RO: Element calcaros rigid din structura exoscheletului care protejează canalele interne ale aparatului acvifer.
EN: A rigid calcareous element in the exoskeleton structure that protects the internal canals of the water vascular system.
Ambulacru închis / Closed ambulacrum
RO: Formă anatomică evoluată în care șanțul este acoperit complet de plăci osoase protectoare.
EN: An evolved anatomical form in which the groove is completely covered by protective bony plates.
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