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Spiny Dogfish And Trout Dissection (Including comparative anatomy)

Spiny Dogfish And Trout Dissection (Including comparative anatomy). Caitlin Feeney September 22, 2009. External Anatomy.

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Spiny Dogfish And Trout Dissection (Including comparative anatomy)

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  1. Spiny Dogfish And Trout Dissection(Including comparative anatomy) Caitlin Feeney September 22, 2009

  2. External Anatomy Eyes allow the dogfish to see, the spiracle is like another gill slit that supplies oxygen to the eyes and brain of the shark, and the gill slit aids in respiratory functions. Specifically, the shark takes in water through the mouth and then exits through the gill slits after the oxygen has been absorbed. Gill slits eye spiracle

  3. External Anatomy (cont.) The Ampullae of Lorenzini are able to detect weak magnetic fields given off by other fish and it aides them in locating prey. The cloacal opening is used for both excretory and reproductive purposes. mouth Ampullae of Lorenzini Pelvic fin Cloacal opening nostril

  4. External Anatomy (cont.) The dogfish uses all of its fins in order to swim and move while its spines are used to injure prey. Anterior Dorsal Fin Posterior Dorsal Fin spine Caudal fin Lateral line Pectoral Fin

  5. Incisions Lateral incision Longitudinal incision scalpel scissors

  6. Internal Anatomy The liver is important to the shark as it stores fats and helps to rid the body of toxins. The ovaries are used for reproduction and the gall bladder stores bile which is important to digestion. Gall Bladder Ovaries Liver (3 lobes)

  7. InternalAnatomy (cont.) The stomach digests food and absorbs nutrients, the intestine carries food and absorbs more nutrients, and the dorsal aorta supplies blood to the majority of the body. stomach Dorsal Aorta Kidney Duodenum The kidney produces urea and excretes toxins Intestine

  8. Internal Anatomy (cont.) Pancreas Uterus The uterus nourishes and holds offspring while the pancreas produces important hormones and enzymes.

  9. Internal Anatomy (cont.) heart gill The heart’s primary function is to pump blood throughout the body while the gill allows fish to absorb oxygen and excrete carbon dioxide.

  10. Offspring The yolk sac provides nutrients to the developing offspring. Yolk sac offspring

  11. Anatomy of the Trout

  12. External Anatomy Anterior Dorsal Fin Posterior Dorsal Fin Pelvic Fins Caudal Fin Anal Fin Pectoral Fins

  13. Anterior External Anatomy and Scales Eye Nostrils Gill Slits Lateral Line Mouth Trout Scale This scale is magnified 4X on a spectroscope; blue in color

  14. Internal Anatomy Air Bladder Intestines Liver Dorsal Aorta

  15. Comparative Anatomy of Spiny Dogfish and Trout Trout Spiny Dogfish

  16. Fins Anterior Dorsal Fins Posterior Dorsal Fins Pectoral Fins

  17. Dorsal Aorta Dorsal Aortas

  18. Air Bladder The trout contains an air bladder which is used to regulate its elevation in the water. The Spiny Dogfish lacks this organ as it is a saltwater fish.

  19. Scales The trout's’ scales are considerably larger than that of the Spiny Dogfish. The dogfish’s scales are not visible to the human eye. Trout Scale; Power 4X

  20. Works Cited • "Trout Dissection." Home | www.troutintheclassroom.org. Web. 12 Jan. 2010. <http://www.troutintheclassroom.org/teachers/library/trout-dissection>. • "Trout fish anatomy drawing sketch image illustration." Biographix Home Page. Web. 12 Jan. 2010. <http://www.biographixmedia.com/biology/trout-fish-anatomy.html>.

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