Aim: the aim is to dissect the brain and identify all the different parts of it.
Equipment: a semi –frozen sheep’s brain, dissecting board, dissecting instruments (scalpel, forceps, scissors), plastic ruler, paper towel and gloves.
* We placed the brain so that the cerebral hemispheres are at the top of the board and the brain stem is at the bottom. * My group identified the external features of the brain: the cerebral hemispheres, cerebellum and brain stem. * We also used the forceps and tried to lift the meninges (membranes protecting the brain). We then observed the cerebral fluid between these membranes and the hemispheres. * My group carefully observed the overall appearance of each structure and, using a plastic ruler, measure its size (length, width and height). Include this information in a table. …show more content…
* On our diagram we identified and labelled the part of the brain that controls the sheep’s: (a) Heart rate (b) Balance required for walking (c) Ability to locate it’s lamb
* We used the scalpel, to cut the brain in half between the right and left hemispheres, and separate the two cerebral hemispheres. * After we drew a cross-section of the brain.
Be sure to label it! * Then we made a second cut down through the back of one of the hemispheres to see inside the cerebellum and brain stem.
Brain Structure | Colour | Texture | Other Features | Size | Cerebrum | Pink | Slimy | Smell | Length 11.8 | Cerebellum | Pink/Red | Smooth | Smell | Width 7.7 | Brain Stem | White | Hard | Smell | Height 2.3 |
Discussion: 1. Which structures contain the grey and white