Hemal Arch (Noun)
Meaning
A structure arising ventrally from a vertebral centrum and enclosing the caudal blood vessels.
Classification
Nouns denoting body parts.
Examples
- The posterior border of each hemal arch is formed by a plate-like process.
- In modern tetrapods, hemal arches are incorporated into the vertebral centra.
- Vertebral artery may be contained in the space between the hemal arch.
- Each hemal arch encloses intervertebral caudal artery in lizards and some ancient amniotes.
- A plate-like hemal arch protects the ventral surfaces of intervertebral caudal arteries.