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Dissection of an adult bullfrogs central nervous system CNS Experiment consists of the dissection and analyzation of a bullfrogs nervous system Dissection consists of the isolation of the CNS consisting of the brain and spinal cord It also consists of analyzing the nervous tissue under the microscope Materials needed frog scalpel razor blade dissecting tray pins forceps scissors microscope slides slide covers water blue dye diagram of frogs brain paper towel The bullfrogs CNS is composed of the brain which is further divided into the olfactory bulb cerebrum optic tract optic lobe pituitary gland and the cerebellum Also contained within the CNS is the spinal cord which in contained within the spine The brain was about an inch in length and of an inch in diameter The spinal cord was about 25 inches in length and the diameter of the spine was about 18 of an inch The cerebellum in the frogs brain is very small in comparison to the rest of the brain and also to the size of the cerebellum in other animals compared to the size of their brains Place the frog in the dissecting tray so the ventral section faces upwards with the head pointing away from you This will allow for easier access to the CNS since you dont have to cut through the skull Pin each of its legs down to the tray using the pins Using the scalpel start the incision at the base of the jaw This will be a superficial cut just enough to cut through the skin Pull the scalpel in a caudal direction towards the tail After youve done this make another incision lateral to where you started the first one and another one where you ended the cut Pull the skin back and either cut it off or pin it down Muscle of the breastbone and abdomen will be exposed Using the scissors make a deep cut
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