Adjective
Around the viscera; as, the perivisceral cavity.
Source: Webster's dictionaryAside from the water vascular system, echinoderms have a haemal coelom (or haemal system, the "haemal" being a misnomer), a perivisceral coelom, a gonadal coelom and often also a perihaemal coelom (or perihaemal system). Source: Internet
This pumps the blood from the front end of the heart into the perivisceral sinus containing the organs. Source: Internet