Observational experiments on slices of whirligig, trematode, and tapeworms

Summary

Source of content: general zoology lab guide.

Operation method

Observational experiments on slices of whirligig, trematode, and tapeworms

Principle

1. understand that flatworms are flat-bodied, bilaterally symmetrical, and have a tritrophic system by studying the morphological structure of vortex worms. 2. understand the characteristics of the phylum Trematoda by studying the morphological structure of the Wahlbachia testudinosa and noting the structural changes that they have induced due to their parasitic lifestyle. 3. understand that the phylum Cestoda has been structurally simplified and specialised by looking at the pig tapeworms to illustrate that the high degree of parasitism life adaptation.

Materials and Instruments

Sections of trematodes, trematode sections, tapeworm sections, immersion specimens.
Microscope Slides Coverslips

Move

1. observe a mount and cross-section slide specimen of the whirligig worm, noting its structure and body layers.
2. observe whole mounts and cross-sectioned slide specimens of the Chinese branch testate trematode, noting their structure and body layers.
3. observe slide specimens of head nodes, mature nodes and pregnant nodes of pig tapeworms and their immersion specimens.
4. demonstration: observation of vortex worm reproductive system and nervous system mounts.

Common Problems

I. Homework:

1. compare the similarities and differences in the morphological structure of vortex worms, trematodes and tapeworms.

2. Draw a cross sectional structure of a vortex worm.

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