Hemal arch
Hemal He"mal, a. [Gr. a"i^ma blood.] Relating to the blood or blood vessels; pertaining to, situated in the region of, or on the side with, the heart and great blood vessels; -- opposed to neural. [1913 Webster]

Note: As applied to vertebrates, hemal is the same as ventral, the heart and great blood vessels being on the ventral, and the central nervous system on the dorsal, side of the vertebral column. [1913 Webster]

{Hemal arch} (Anat.), the ventral arch in a segment of the spinal skeleton, formed by vertebral processes or ribs. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • hemal arch — n a bony or cartilaginous arch extending ventrally from the spinal column esp the arch formed by a vertebra and an associated pair of ribs * * * one of the cartilaginous structures surrounding the caudal vein in the tail of the vertebrate embryo …   Medical dictionary

  • hemal arch — noun a structure arising ventrally from a vertebral centrum and enclosing the caudal blood vessels • Syn: ↑haemal arch • Hypernyms: ↑arch • Part Holonyms: ↑centrum * * * noun : a bony or cartilaginous arch extending ventrally from the spinal… …   Useful english dictionary

  • hemal arch — haemal arch …   Dictionary of ichthyology

  • Hemal — He mal, a. [Gr. a i^ma blood.] Relating to the blood or blood vessels; pertaining to, situated in the region of, or on the side with, the heart and great blood vessels; opposed to neural. [1913 Webster] Note: As applied to vertebrates, hemal is… …   The Collaborative International Dictionary of English

  • hemal canal — the space within the hemal arch …   Medical dictionary

  • hemal spine — a ventral projection from the hemal arch, which is attached to the underside of certain vertebral centra in lower vertebrates …   Medical dictionary

  • arch — Any structure resembling a bent bow or an a.; an arc. In anatomy, any vaulted or archlike structure. See arcus. SYN: arcus [TA]. [thru O. Fr. fr. L. arcus, bow] abdominothoracic a. a bell shaped line defined by the lower end of the sternum and… …   Medical dictionary

  • haemal arch — noun a structure arising ventrally from a vertebral centrum and enclosing the caudal blood vessels • Syn: ↑hemal arch • Hypernyms: ↑arch • Part Holonyms: ↑centrum …   Useful english dictionary

  • Neural arch — Neural Neu ral, a. [Gr. ney^ron nerve.] (Anat. & Zo[ o]l.) relating to the nerves or nervous system; taining to, situated in the region of, or on the side with, the neural, or cerebro spinal, axis; opposed to {hemal}. As applied to vertebrates,… …   The Collaborative International Dictionary of English

  • neural arch — n the cartilaginous or bony arch enclosing the spinal cord on the dorsal side of a vertebra called also vertebral arch * * * see vertebra * * * one of the cartilaginous structures surrounding the embryonic spinal cord, formed by the dorsad growth …   Medical dictionary

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