WebNephridium of Hatschek: Besides the nephridia, a tube called the nephridium of Hatschek is regarded to be excretory in function. It arises from the mouth and proceeds forward to the right side of the notochord. It is an ectodermal derivative and … WebMar 27, 2024 · biology, study of living things and their vital processes. The field deals with all the physicochemical aspects of life. The modern tendency toward cross-disciplinary research and the unification of scientific knowledge and investigation from different fields has resulted in significant overlap of the field of biology with other scientific disciplines. …
Earthworm Anatomy and Dissection Guide - BIOLOGY JUNCTION
WebAug 23, 2024 · 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. WebApr 1, 2024 · Each septal nephridium consists of the nephrostome, neck, body of nephridia and therefore the terminal duct. The pharyngeal gland consists of the many chromophil cells, which produces saliva containing proteolytic enzymes; protease and mucin. Each septum bears nephridia on both the surfaces arranged in semi-circles around the intestine, two ... laith assaf
Branchiostoma: Distribution, Structure and Systematic Position
The nephridium (plural 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 … See more A metanephridium (meta = "after") is a type of excretory gland found in many types of invertebrates such as annelids, arthropods and mollusca. (In mollusca, it is known as the Bojanus organ.) A metanephridium … See more A protonephridium (proto = "first") is found in the phyla Platyhelminthes, Nemertea, Rotifera and Chordata (lancelets). They have the same … See more • • Baeumler N., Haszprunar G. & Ruthensteiner B. (2012). "Development of the excretory system in a polyplacophoran mollusc: stages in metanephridial system development". See more WebPhylum Annelida includes vermiform, segmented animals. Segmentation is seen in internal anatomy as well, which is called metamerism. Annelids are protostomes. These animals have well-developed neuronal and digestive systems. Some species bear a specialized band of segments known as a clitellum. Annelids show the presence numerous chitinous ... Webnephridium: [noun] a tubular glandular excretory organ characteristic of various invertebrates. laithbutts