Figures 1a & 1b below are photomicrographs of two vessels of the circulatory system.
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![](/sites/default/files/styles/full_width/public/revisionworld/1a.jpg?itok=pZe3b4n4)
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![](/sites/default/files/styles/full_width/public/revisionworld/1b.jpg?itok=TTOn3SmI)
(i) Identify the blood vessels shown in figures 1a & 1b. [ 2 ]
(ii) State TWO characteristics of the blood vessel in Figure 1a that relate to its function and explain how each characteristic helps the blood vessel in the efficient transport of blood. [ 4 ]