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Crayfish Lab Preview

Crayfish Lab Preview. April 24, 2012. Crayfish General Information: Phylum: Arthropods - means “jointed foot” Class: Crustaceans 2 Body Parts : Cephalothorax Abdomen Review : General Terms: Dorsal – top side Ventral – bottom side Anterior – front end

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Crayfish Lab Preview

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  1. Crayfish Lab Preview April 24, 2012

  2. Crayfish General Information: • Phylum: Arthropods - means “jointed foot” • Class: Crustaceans • 2 Body Parts: • Cephalothorax • Abdomen • Review: General Terms: • Dorsal – top side • Ventral – bottom side • Anterior – front end • Posterior – back end Cephalothorax Abdomen Posterior Dorsal Ventral Anterior

  3. Crayfish External Features: Cheliped Antennae Compound Eye Walking legs Segment Telson

  4. Crayfish Body Systems • Circulatory System – How the blood circulates through the body. • Dyed pink • Heart - pumps blood. • Arteries – transports blood into open spaces (open circ. System) • Respiratory System • Gills – breathe under water. Heart Dorsal Abdominal Artery Gills Ventral Abdominal Artery

  5. Crayfish Body Systems Continued • Nervous System – Used to sense and feel things • Brain – very difficult to see. • Nerve Cord – only on ventral side of the crayfish Brain Nerve Cord

  6. Crayfish Body Systems Continued • Reproductive System – Making more crayfish • Male – letter A in picture • Testis – make sperm • Sperm Duct • Male opening • Swimmerets – moves sperm • Female – letter B in picture • Ovary – holds eggs • Oviduct opening • Swimmerets – moves eggs Testis Sperm Duct Ovary Oviduct opening Swimmerets

  7. Crayfish Body Systems Continued • Digestive System – Taking in food and breaking it down. • Mouth • Esophagus • Stomach - 2 interesting features • Location • Rows of teeth • Intestine • Anus Esophagus Intestine Stomach Anus Mouth

  8. Crayfish Body Systems Continued • Excretory System – Gets rid of wastes. • Anus – releases wastes. Anus

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