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
