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Crayfish
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CRAYFISH Body: Two segments: Cephalothorax: Fused head and thorax
13 segments covered by a hard carapace Abdomen: 7 segments Mandibles: jaws for chewing (crush food) Maxillae: holds food and passes it to the mandibles and the mouth (tear food) Maxillipeds: sense organs which also help pass food to the mouth Chelipeds: large, pincer appendages for food getting and protection Antennae: segmented sense organs on the head (touch/taste) Antennule: segmented sense organ (touch/taste/equilibrium) Walking legs: four pairs Swimmerets: aid in swimming and holding fertilized eggs in the female Blood returns to the heart through a slit (osita) Green gland: nitrogenous waste excretion (located in the head) Senses: compound eye /balance organ Reproduction: sexual (distinct sexes) Respiration: gills
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Abdomen
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Antennae
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Antennule
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Carapace
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Cephalothorax
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Cheliped
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Digestive Gland (Dorsal)
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Digestive Gland (Lateral)
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Eggs
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Esophagus
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External View (Dorsal)
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External View (Ventral)
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Eye
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Female
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Male
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Ganglion Anterior
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Ganglion Posterior
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Gill
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Gonad
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Green Gland
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Heart
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Intestine
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Mandible
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Maxilla
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Maxillaped
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Muscle
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Stomach
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Swimmeret
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Telson
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Uropod
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Ventral Nerve Cord
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Ventral Nerve Chord Posterior
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Walking Leg
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MOLTING
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