Final answer:
A stained whole mount of a leech (Class Hirudinea) reveals body segments, s*ckers, cl*tellum, reproductive organs, nerve ganglia, and digestive system.
Step-by-step explanation:
Different structures are visible in a stained whole mount of a leech (Class Hirudinea) when viewed using a dissecting scope. The body segments, or annuli, which each have setae and external annulations, are the most noticeable features. It is easy to see the front and posterior s*ckers, which are essential for attachment and movement.
It is possible to see the distinctive cl*tellum, a specialised area used in reproduction. Examining the reproductive organs, nerve ganglia, and digestive system internally is possible. A thorough examination of these structures is made possible by the staining, which intensifies the contrast.
Your question is incomplete, most probably the complete question is:
What structures can be observed in a stained whole mount of a leech (Class Hirudinea) under a dissecting scope?