The part of the coelom in the embryo between the somatopleuric and splanchnopleuric mesoderm; the principal body cavities of the trunk (thoracic, abdominal, and pelvic) arise from this embryonic part of the coelom. [ MP:0012187 http://www.informatics.jax.org/accession/anna ]

Synonyms: somatic coelom

This is just here as a test because I lose it