Crayfish, Sea Star, and Grasshopper

I bought one set of seven dissection specimens and have several left-over specimens I want to use.  So we had three crayfish, one sea star, and one grasshopper.  This year’s class is small; I’m working with what I have.  When you dissect the crayfish and grasshopper, focus on the appendages.  You can see some of the internal organs—but not well.  Don’t be too concerned if you have trouble identifying individual organs inside the crayfish and grasshopper.  We use four different guides and images from the internet and still have trouble identifying more than the most obvious organs.