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Glite Dictionary
hemal arch

hemal arch

9.9
A bony part under a tail bone that protects tail blood vessels
  • noun
  • /ˈhiːməl ɑːrk/
  • Specialized
translation icon : arco hemal
  • The hemal arch protects the major blood vessels running beneath the tail vertebrae of many fish and reptiles.

Examples

  • Damage to the hemal arch can result in impaired blood flow in the caudal region.

  • In fish, the hemal arches protect vital arteries.

  • Researchers examined the shape of each hemal arch to study its evolutionary significance.

  • The hemal arch supports the caudal blood vessels.

  • The hemal arch provides essential protection for the blood vessels beneath the tail of the fish.

  • Researchers found that the structure of the hemal arch varies significantly among different species of reptiles.

  • In many vertebrates, the hemal arch is crucial for ensuring proper blood circulation in the tail area.

Surface Forms

hemal arch singular
hemal arches plural

Morphology

hemal + arch

The compound is compositionally built from 'hemal' (blood-related) and 'arch' (arched structure), so a learner who knows those constituents could infer it refers to an arch-like structure associated with blood vessels. However, the precise anatomical details (its position under the vertebral centrum, that it is bony or cartilaginous, and that it encloses caudal vessels) are specialized and not fully predictable from the constituents alone. Therefore the term is partially transparent but requires domain knowledge for the full meaning.

Etymology

Hemal arch comes from the image of a small bone arch under the tail that protects the main blood vessels, and hemal refers to 'blood'. So the picture of a little arch covering the tail's blood vessels explains why the name means a protective bony cover.