What is the difference between tapeworms and flukes? Reasons for the differences between planarian f

Tapeworms and flukes are distinguished in the following four ways:

1.Appearance: The tapeworm is flattened and segmented, and the body is composed of three parts: the cephalic segment, the cervical segment and the somite, the anterior end is the cephalic segment, and the rear segment is the cervical segment, and the somite can be divided into immature proglottids, mature proglottids and pregnant egg glottids.

Most of the flukes are flattened leaf-shaped, with oral suckers at the front end and ventral suckers on the ventral surface, and most of them are hermaphroditic.

2.Mode of infection: Tapeworm larvae can infect humans and are more harmful. Flukes are mainly fed with blood and tissues, and have a long lifespan, up to 20 years, with symptoms such as cough, wheezing, fever, and even epilepsy, paralysis and other problems.

3.Developmental history: The developmental history of tapeworms is complex and requires an intermediate host, in which there are different types of larvae, such as cysticerci , polycephalic larvae, echinococcus and cysticerci like cysticerci in the middle host. The developmental history of flukes is relatively simple.

4.Symptoms: Tapeworm infection can cause some digestive symptoms such as enteritis, diarrhea and indigestion. Flukes live in other organs such as the liver, causing coughing, wheezing, fever and other problems.

1. Planarians. The body surface is generally ciliated, and the body wall is typical of the cutaneous muscle capsule. The epidermis is made up of columnar epithelial cells in the ectoderm.

composition, in which there are a large number of glandular cells, rod bodies. The head has eyes and auricular protrusions; 2. Flukes: There are no cilia, rod-like bodies, and no general epithelial cells on the body surface, and most species develop a cortex with small spines.

Except for the parasitic species, some of which still have eyespots, the endoparasitic species have disappeared from the eyepoint sensory organs, and adsorbers, such as muscular suction cups and small hooks, have been developed. 3. Tapeworms.

The body is a dorsoventral flattened band, generally composed of many proglottids, and a few species are not segmented. The anterior end of the body has a specialized scolice, where the attachment organs are concentrated, and there are structures such as suction cups, small hooks, or suction grooves. The cilia on the body surface are absent and have cortical microhairs.

It can be known based on their life history. Tapeworm larvae live parasiticly, while flukes can live independently. This is in general zoology books.

At present, the animal kingdom is divided into more than 20 phyla, of which the main ones are the following: 1phylum protozoa, such as clogs, amoeba; 2.

sponges, such as hairy pots, bath sponges; 3.Coelenterates phylum such as jellyfish, corals; 4.Platyzoa phylum, such as planarians, schistosomiasis; 5.

Prenematos, such as roundworms and other parasitic nematodes that are born in plants and animals; 6.Annelids, such as earthworms, sand silkworms, leeches; 7.phylum molluscs, such as snails, squid; 8.

phylum Arthropods, such as shrimp, crabs, insects; 9.Echinoderms, such as sea cucumbers, starfish; 10.Vertebrate phylum such as fish, frogs, turtles, snakes, birds, beasts.