Cow´s kidney dissection

1. COW´S KIDNEY DISSECTION
LAB PRACTICE
SEVENTHGRADE
LAB REPORT
1. Tittle: COW´S KIDNEY DISSECTION
2. Objectives:
• Identify the lab practices as axis of work in the biology
• Identify the structure of the circulatory system through the dissection of a cow´s kidney dissection
in the biology's lab.
• To consolidate the knowledges with a lab practice.
3. Theory:
4. Hypothesis: a prediction about the experiment, which will be the result.
5. Equipment, instruments and materials used: Description, function and drawing of each one.
6. Procedure.
7. Data and information.
8. Calculations and results.
9. Analysis.
10. Conclusions.
11. References.
EQUIPMENT
1. A kidney of cow.
2. Sharp scissors (dissection kit).
3. Plastic gloves.
4. Towel absorbent paper.
5. Storage bag
6. Lab apron
PROCEDURE
1. Examine the outside of the kidney. The ureter, renal artery, and renal vein all enter the kidney in
the same area. If they are present, the ureter can be identified by the larger amount of adipose
tissue that is usually attached to it.
2. Identify the ureter, renal artery, and renal vein if they are present.
3. Observe the renal capsule and adipose capsule.
4. Find the renal hilus. This is the “pinched-in” area where renal blood vessels and the ureter attach
to the kidney.

2. 5. Carefully, using the forceps, pinch the renal capsule and make a small incision with the scissors to
start a hole in the capsule. Using the scissors and forceps, remove the capsule.
6. Letting the kidney lie flat as shown in the figure at left, cut the kidney in half lengthwise from the
side. Do not cut until you have checked and are sure of the correct direction of your cut—As a
surgeon, you only get one chance to cut, and there is no way to redo this.
7. Use flagged pins to identify the following parts of the internal kidney:
• Cortex
• Renal Column
• Medullary Pyramid
• Minor Calyx
• Major Calyx
• Renal Pelvis
• Ureter
• Renal Artery
• Vein
8. After you have identified all the structures in the kidney, work with your group to trace the path
taken through your group’s kidney by the blood, and by the filtrate that becomes the urine. As
you do this, point out and name all the structures that are involved. When your group is satisfied
that you can do this well, your group should use the kidney to explain it to teacher.