WebOverview Parasitic Flatworms . Parasitic flatworms include flukes and tapeworms. Most parasitic flatworms are endoparasites with complex life cycles with multiple hosts. The definitive host is inhabited by adult, sexually reproductive worms and one or more intermediate hosts are inhabited by juvenile stages of the worm. WebJun 8, 2024 · Flame cells are found in freshwater invertebrates, such as flatworms, including parasitic tapeworms and free-living planaria. Figure 41.8. 1: Flame cells and nephridia: In the excretory system of the (a) planaria, cilia of flame cells propel waste through a tubule formed by a tube cell. In (b) annelids, nephridia filter fluid from the body …
22.3. Excretion Systems – Concepts of Biology – 1st Canadian Edition
Webflatworm: [noun] any of a phylum (Platyhelminthes) of soft-bodied usually much flattened acoelomate worms (such as the planarians, flukes, and tapeworms) — called … WebThe 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 protonephridia.All nephridia- and kidney- having animals … how ancient cultures used crystals
11.7: Roundworms - Biology LibreTexts
WebFeb 6, 2024 · flatworms, which include tapeworms and flukes; roundworms, which cause ascariasis, pinworm, and hookworm infections; Tapeworms. Humans get tapeworms by eating raw or uncooked pork or beef. Species ... WebCorrect option is C) Nephridia are the excretory organs in the invertebrates which help in excretion and removal of metabolic waste. Protonephridia are the type of nephridia which is a network of dead-end tubules lacking internal openings. They are ciliated and constantly move to remove the nitrogenous waste and help in osmoregulation. WebMar 5, 2024 · Actually, they do not. Whereas flatworms are flat, roundworms obviously appear round. With over 80,000 species, there are plenty of different types of roundworms. ... Hookworm larvae enter the host through the skin. They migrate to the intestine, where they mature into adults. Adults lay eggs, which pass out of the host in feces. Then the … how many hours is 0.7 fte