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apo223Lab8 - Arria Owlia apo223 Bio 206L Lloyd 50105 1:30...

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Arria Owlia – apo223 Bio 206L – Lloyd – 50105 03/18/08 – 1:30 PM Lab 8 – Anatomy of the Rat: The Dissection of a Representative Vertebrate Purpose:   To dissect a rat in order to compare its structures’ physiological and anatomical functions and to compare  these results with that of human structures’ functions. Abstract:  We were going to dissect during this lab, so we had to follow general guidelines such as avoiding mutilation of  the rat and following directions exactly as they were printed. First, we obtained a rat ( Rattus rattus ) and placed it in our  dissecting tray. We then identified the different regions, i.e. anterior/dorsal/caudal, etc.  Then we identified some outer  body parts on the rat like the anus, scrotal sacs, teats (female), eyelids, and ears. Placing our rat on its dorsal side, we cut  a window into the rat. We then went through the parts of the circulatory system including the diaphragm, thymus,  pericardial membrane, heart and its associated  blood vessels, and vessels of the forelimbs, of the hind limbs, of the tail,  of the neck and head, of the lungs, of the liver, of the of the kidneys, of the tail, and of the small intestine. Then we went  into the digestive system. Here we saw salivary glands, the tongue, the pharynx, the esophagus, the liver, the duodenum, 
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