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Investitigation of Veins and arteries. Research topic: the elasticity of cows vein and aorta hung with different masses.

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Introduction

LAVENDER'S PRATICAL REPORT of ELASTICITY OF VEIN AND ARTERY Research topic: the elasticity of cow's vein and aorta hanged with different masses. Hypothesis: the vein and aorta are to main blood vessels in our hearts which are very elastic. Depends on the function of each vessel, they are placed under different pressure. Through the arteries, blood is pumped to the body, while in through the vein, blood comes back to the heart. Hence, the elasticity of them is differentiated. Pumping blood to the whole body means higher pressure so that artery have thicker walls and more elastic than veins. ...read more.

Middle

Use the clip to hang the aorta ring on the stand 3. Measure the length of the aorta ring 4. Add a weight of 100 grams to the aorta ring 5. Measure the length of the aorta ring 6. Repeat step 4 and 5 for 9 times (the maximum mass added is 1000 grams) 7. Repeat all the steps with vena cava 8. Record the result. Raw data collecting Data processing: The length of both vein and artery was increasing very clearly at the beginning duo to the increase of mass added. ...read more.

Conclusion

700.00 68.20 80.75 4.15 6.50 800.00 69.80 82.75 3.11 7.63 900.00 71.00 84.50 3.08 7.72 1000.00 72.00 86.00 2.83 10.39 Quanlitative data: As we can see, the percentage increase in length of both vein and artery is increasing at the beginning but keep constant at the end. This is because the blood vessels have reached their limitations. Compare the two length increase in vein and artery, we can see that the artery increase in length less than the vein. The reason for this is the artery have thicker walls and harder in order to complete its mission as the carrier of blood to the whole body. ...read more.

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