WebPlanaria are flatworms that live in fresh water. Their excretory system consists of two tubules connected to a highly branched duct system. The cells in the tubules are called …

11.6: Flatworms - Biology LibreTexts

WebJul 6, 2024 · Why flatworms have incomplete digestive system? Parasitic forms feed on the tissues of their hosts. Most flatworms, such as the planarian shown in Figure 1, have a gastrovascular cavity rather than a complete digestive system. In such animals, the “mouth” is also used to expel waste materials from the digestive system. WebThey lack a digestive system - Compared to the two other classes of flatworms, tapeworms lack a digestive system. Instead, the surface of their bodies are covered by small microvillus-like projections similar to those … lakefront craftsman house plans

Platyhelminthes: Habitat, Structure and Development - Biology …

WebReproduction. With very few exceptions, platyhelminthes are hermaphroditic, and their reproductive systems are generally complex. Numerous testes but only one or two ovaries are usually present in these flatworms. The female system is unusual in that it is separated into two structures: the ovaries and the vitellaria, often known as the ... WebAnnotated classification. There is no unanimity concerning the classification of platyhelminths. The following classification should be considered provisional.. Phylum Platyhelminthes (flatworms) Flat, unsegmented worms; gastrovascular cavity and respiratory, skeletal, and circulatory systems absent; excretion by means of flame-bulb … WebCorrect option is A) The excretory organs of flatworms (Platyhelminthes) are flame cells and function like a kidney, removing waste materials. Nephridia remove metabolic wastes from an animal's body. They are present in annelids. The Malpighian tubule is a tubular excretory organ, a number of which open into the gut in insects and some other ... helicopter shooting games free