"Guy...cute guy."
the crayfish specimen...
dissecting...
the white flaky looking pieces on the outside of the crayfish are it's gills...A week later I am back dissecting. This time the organism is a crayfish.
An interesting fact I have learned about spiders, crusteceans, and other insects is that they do not have capilliaries that carry the blood through their body to distribute the nutrients. Instead, these invertebrates have cavities in their body that the blood goes into when it leaves the veins. The blood has direct contact with the part of the body that need the nutrients. Isn't that amazing!
The cons about this circlutory system is that gravity helps the blood to move back into the veins. So if a inverebrate lays upside down for a long time, it will die because its blood can't circulate properly.
"Guy, cute guy," Gracie whispered as she rubbed her finger on the crayfish and laughed when its eyes were looking her way.
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