A-LevelBiologyTransport in mammalsOct/Nov 2019Paper 2 Q414 Marks
In mammals, arteries branch to form smaller blood vessels called arterioles. Arterioles branch to form capillaries that supply blood to tissues. Fig. 4.1 shows transmission electron micrographs of cross-sections through an arteriole and a capillary. Fig. 4.2 shows a capillary network in a mammalian tissue. The arrows indicate the direction of flow of body fluids.
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