Biomaterial Database

Structural changes in the kidney of freshwater mud eel Amphipnous cuchia (Ham.) subjected to different osmotic conditions. 1980

S Das, and G J Srivastava

A histophysiological study was made of the kidney of Amphipnous cuchia subjected to different osmotic conditions (distilled water, 50% and 15% sodium chloride solution). These fish possess typical glomerular kidneys having nephrons composed of a glomerular body, neck segment, proximal convoluted segment (I & II), distal segment, and collecting duct system. When subjected to a hypotonic medium (distilled water) the fish show marked expansion in glomeruli resulting in 'glomerulitis'. A marked shrinkage in glomerular body tissue is found after 50% salt solution treatment and the fish die within one hour of immersion. Many pathological changes occur in the renal capsule and renal segment when the fish are treated with 15% salt solution. The glomerular bodies show shrinkage, degeneration and cyst formation. The glomerular shrinkage is probably due to constriction of arterioles which affects the filtration rate and thus protects against loss of water. Formation of cysts could be a protective device to save the glomeruli from degeneration. The renal tubules show hypertrophy, vacuolization, nuclear degeneration and cyst formation.

UI	MeSH Term	Description	Entries
D007668	Kidney	Body organ that filters blood for the secretion of URINE and that regulates ion concentrations.	Kidneys
D009997	Osmotic Pressure	The pressure required to prevent the passage of solvent through a semipermeable membrane that separates a pure solvent from a solution of the solvent and solute or that separates different concentrations of a solution. It is proportional to the osmolality of the solution.	Osmotic Shock,Hypertonic Shock,Hypertonic Stress,Hypotonic Shock,Hypotonic Stress,Osmotic Stress,Hypertonic Shocks,Hypertonic Stresses,Hypotonic Shocks,Hypotonic Stresses,Osmotic Pressures,Osmotic Shocks,Osmotic Stresses,Pressure, Osmotic,Pressures, Osmotic,Shock, Hypertonic,Shock, Hypotonic,Shock, Osmotic,Shocks, Hypertonic,Shocks, Hypotonic,Shocks, Osmotic,Stress, Hypertonic,Stress, Hypotonic,Stress, Osmotic,Stresses, Hypertonic,Stresses, Hypotonic,Stresses, Osmotic
D005618	Fresh Water	Water containing no significant amounts of salts, such as water from RIVERS and LAKES.	Freshwater,Fresh Waters,Freshwaters,Water, Fresh,Waters, Fresh
D000811	Anguilla	A genus in the Family Anguillidae, Order Anguilliformes, that includes fresh water eels.	Anguillas
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D012462	Saline Solution, Hypertonic	Hypertonic sodium chloride solution. A solution having an osmotic pressure greater than that of physiologic salt solution (0.9 g NaCl in 100 ml purified water).	Hypertonic Saline Solution,Hypertonic Solution, Saline,Sodium Chloride Solution, Hypertonic,Hypertonic Saline Solutions,Hypertonic Solutions, Saline,Saline Solutions, Hypertonic,Sodium Chloride Solutions, Hypertonic,Saline Hypertonic Solution,Saline Hypertonic Solutions,Solution, Hypertonic Saline,Solution, Saline Hypertonic,Solutions, Hypertonic Saline,Solutions, Saline Hypertonic
D014882	Water-Electrolyte Balance	The balance of fluid in the BODY FLUID COMPARTMENTS; total BODY WATER; BLOOD VOLUME; EXTRACELLULAR SPACE; INTRACELLULAR SPACE, maintained by processes in the body that regulate the intake and excretion of WATER and ELECTROLYTES, particularly SODIUM and POTASSIUM.	Fluid Balance,Electrolyte Balance,Balance, Electrolyte,Balance, Fluid,Balance, Water-Electrolyte,Water Electrolyte Balance