crayfish dissection test
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to what kingdom does crayfish belong?
to what phylum does crayfish belong?
to what subphylum does crayfish belong?
Describe the crayfish respiratory system.
- - pinkish-brown gills
- - under the carapace, above the legs
Describe the crayfish circulatory system
- - heart (located medially on the dorsal side)
- - open circulatory system: the heart pumps blood toward the head, then it flows backwards, bathing organs; it collects in sinuses (hollows) around the heart
Describe the crayfish nervous system.
- - a simple brain
- - vental nerve cord
Describe the excretory system of the crayfish
-green glands in the head filter blood and release waste through pores near the antennae
Describe the crayfish digestive system.
- - maxilipeds ("jaw feet") bring food into mouth
- - mandibles (jaws) for biting food
- - mouth
- - stomach, which contain teeth made of chitin
- - intestine absorbs nutrients
- - anus releases waste
Describe the reproductive system of the crayfish.
- - female crayfish have ovaries which produce eggs
- - male crayfish have testes which produce sperm
- - female crayfish carry fertilized eggs with swimmerets until they hatch
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