To observe a cross section of artery and vein and to draw a labelled scientific diagram.
A student drew the low power plan shown here:
A student was told that the actual diameter of the artery she observed was 5 mm.
The student drew a line across the diameter of the image of the artery she had drawn, as shown in the diagram (line A). She then measured this line as 70 mm.
Using the equation:
Calculate the magnification of the image she had drawn.
The diameter of the image drawn was 14 times bigger than the actual artery diameter.
Give one obvious difference shown in the diagram between the artery and the vein and explain why this would be an advantageous adaptation.
The muscle wall of the artery is much thicker than the muscle wall of the vein.
The artery needs this to withstand the higher pressure of the blood in the artery than in the vein.