What are the general characteristics of trematodes?

Trematodes are flatworms classified in the phylum Platyhelminthes, class Trematoda, subclass Digenea. In general, trematodes are dorso-ventrally flattened and leaflike in shape. Their bodies are covered with tegument, which is usually armed with scalelike spines. They have two suckers: one oral and one ventral.

What are characteristics of flukes?

Flukes are leaf-shaped, ranging in length from a few millimeters to 7 to 8 cm. The tegument is morphologically and physiologically complex. Flukes possess an oral sucker around the mouth and a ventral sucker or acetabulum that can be used to adhere to host tissues. A body cavity is lacking.

What is the difference between nematodes and trematodes?

Nematodes have a simple body form, often referred to as a “tube within a tube,” with a simple digestive system that extends from the mouth at one end to the anus at the other. Trematodes have flat, unsegmented bodies usually shaped like a leaf or an oval.

What is trematodes in microbiology?

Trematodes, or flukes, are parasitic flatworms with unique life cycles involving sexual reproduction in mammalian and other vertebrate definitive hosts and asexual reproduction in snail intermediate hosts.

Which of the following is true about trematodes?

All are true regarding trematodes except: They are hermaphrodites. Usually, there are two intermediate hosts. Schistosoma hematobium infection is acquired through metacercaria ingestion. In Paragoninus westermani the second intermediate host is the crab.

Why are trematodes called flukes?

Trematode infections occur worldwide. Trematodes, also called flukes, cause various clinical infections in humans. The parasites are so named because of their conspicuous suckers, the organs of attachment (trematos means “pierced with holes”).

Which of the following are characteristics of flukes quizlet?

Which of the following are characteristics of flukes? They take in food through their mouths. Their life cycle usually involves two or more hosts. Their life cycle almost always involves a snail host.

What are the major differences between cestodes and trematodes?

Cestodes are tape-like and segmented in shape, have a head with suckers and possibly hooks, and lack a digestive tract. Trematodes are leaf-like and unsegmented, lack hooks entirely, and have an incomplete digestive tract. Generally, cestodes require two hosts and trematodes need three to complete their life cycles.

What is one of the main differences between Turbellarians and the trematodes and cestodes?

The Turbellarians are all free-living, and the trematodes and cestodes are 100% parasitic, with often complex life cycles.

Where are trematodes found?

Human infections are most common in Asia, Africa and Latin America. However, trematodes can be found anywhere where untreated human waste is used as fertilizer. Humans can be infected by trematodes either by consuming undercooked contaminated fish or plants, or by ingesting contaminated water.

Do trematodes have a digestive system?

Trematodes have oral and ventral suckers, which they employ for attachment and migration. The digestive system originates at the oral sucker and contains a pharynx, an esophagus, and a bifurcated intestine. There is no anus; thus, waste products must be regurgitated following digestion.

Which one of the following statements about the differences between flukes Trematoda and tapeworms cestoda is true?

Which one of the following statements about the differences between flukes (Trematoda) and tapeworms (Cestoda) is TRUE? Most trematodes are free-living, while most cestodes are parasitic. Trematodes ingest food through their GVC opening, while cestodes absorb nutrients through their outer body surface.