Nephridium - Wikipedia
The nephridium (pl.: nephridia) is an invertebrate organ, found in pairs and performing a function similar to the vertebrate kidneys (which originated from the chordate nephridia). Nephridia remove metabolic wastes from an animal's body. Nephridia come in two basic categories: metanephridia and protonephridia.
Nephridium | Excretory System, Tubules & Cilia | Britannica
Nephridium, unit of the excretory system in many primitive invertebrates and also in the amphioxus; it expels wastes from the body cavity to the (usually aquatic) exterior. The evolution of nephridia encouraged tissue specialization by eliminating the …
Nephridium : Meaning, Physiology and Function - Biology …
Definition of Nephridium: An excretory tubule which opens to the exterior through the nephridiopore and the inner end of the tubule is blind (associated with terminal cells or solenocytes) in the protonephridium or opens in the coelom through the ciliated funnel or called nephrostome in metanephridium.
肾管 - 百度百科
从直接开口于体腔的 肾口 开始，接着为复杂弯曲的细小的肾管（neph－roductus，segmental canal），末端以体壁的小孔即肾孔（ne-phridiopore，nephroporus）与外界相通。. 肾口呈漏斗状，上有许多纤毛，肾管也是由纤毛壁构成的。.
Nephridium - Encyclopedia.com
2018年5月14日 · nephridium (pl. nephridia) The excretory organ of many invertebrates, consisting of a simple or branched tube, formed by the ingrowth of ectoderm, with cilia at the inner end. Excretory products diffuse into the nephridium and are wafted to the exterior by ciliary action.
Nephridium | Invertebrate Excretory Structures | Homeostasis
The most common type of invertebrate excretory organ is the nephridium, a tubular structure designed to maintain appropriate osmotic balance. One of the simplest arrangements is the flame cell system (or protonephridium) of acoelomates (flatworms) and some pseudocoelomates.
Animal evolution: Of flame and collar cells - Cell Press
2021年8月23日 · Nephridia are small excretory organs that function in waste disposal and osmoregulation in a wide range of animals but differ in type and germ-layer origin. A new comparison of gene expression in disparate species supports homology of nephridia across bilaterian animals, and their origin from ciliated epidermal cells.
Nephridia, Malpighian Tubules, Coelomocytes - Britannica
Each nephridium has the form of a very fine tubule, often of considerable length; one end usually opens into the body cavity and the other to the exterior. In some annelids, however, the tubule does not open into the body cavity but ends internally in a cluster of cells of a special type known as solenocytes , or flame cells .
Excretory system of gastropods - Wikipedia
The excretory system of gastropods removes nitrogenous waste and maintains the internal water balance of these creatures, commonly referred to as snails and slugs. The primary organ of excretion is a nephridium. Drawing of excretory system of Lymnaea meridensis; renal tube and ureter in renal region extending between pericardium and mantle collar.
Animal evolution: Of flame and collar cells - ScienceDirect
2021年8月23日 · Nephridia are small excretory organs that function in waste disposal and osmoregulation in a wide range of animals but differ in type and germ-layer origin. A new comparison of gene expression in disparate species supports homology of nephridia across bilaterian animals, and their origin from ciliated epidermal cells.