👉 The rh fluid, also known as rh fluid or rh fluid of the rhynchobranchia, is a specialized fluid found in the gills of certain marine gastropod mollusks, particularly within the family Rhynchobranchidae, commonly known as rhinoceros snails. This fluid plays a crucial role in respiration and osmoregulation by facilitating the exchange of gases and ions between the snail's body and its surrounding water. It contains high concentrations of ions like sodium, chloride, and ammonia, which are actively transported across the gill epithelium to maintain the snail's internal osmotic balance. Additionally, rh fluid aids in the excretion of metabolic wastes and helps regulate the snail's internal pH, contributing to its overall physiological homeostasis.
