Phylum in the domain Eukarya, comprised of animals either with fully developed backbones (VERTEBRATES), or those with notochords only during some developmental stage (CHORDATA, NONVERTEBRATE).
Subject headings from Medical Subject Headings (MeSH) 2026, courtesy of the U.S. National Library of Medicine. ScieBeta is not affiliated with, nor endorsed by, the NLM or the NIH. Resources are linked from their original providers and open directly from them. Licence and credit are shown alongside every item.