The excretory system of the mouse is different from the shark and frog because its liquid waste is excreted through the urethra. Also, the shark contains a rectal gland which helps remove sodium chloride(salt) from the sharks body. The sharks kidneys have a different structure then the mouse and frog because they lie flat on …show more content…
First, the weight of each mouse was recorded. Then, the weight of each of their hearts were recorded. The null hypothesis was that there is no correlation between the weight of the mouse compared to the weight of its heart. The rs value for the Spearman's rank-order test was 0.48. The test determined that there is no correlation between the weight of the mouse and the weight of its heart. The test is shown in Table 1 below.
Figure 1. The mouse prior to dissection with external features labeled.
Figure 2. Images of the mouse during dissection with organs and internal features labeled.
Figure 3. The Dogfish shark prior to dissection with external features labeled.
Figure 4. The labeled internal structures of the dissected dogfish shark.
Figure 5. The labeled organs and internal features of the dissected dogfish shark.
Figure 6. The labeled organs, internal, and external features of a dissected dogfish shark.
Figure 7. Images of the frog after dissection with internal organs labeled.
Figure 8. Image of the frog after dissection with internal organs labeled.
Body weight (g)
Body weight rank
Heart weight (g)
Heart weight rank
Rank Difference squared