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  Indian J Med Microbiol
 

Figure 5: A drawing from Salomon Alberti's De Valvulis, 1585, from the Wellcome Collection. It shows the outside and inside of part of a leg vein, AB, with a muscle tributary vein; C, D, and E are the two cusps of a bicuspid valve in the main vein. These are probably the first drawings of a venous valve[15]

Figure 5: A drawing from Salomon Alberti's <i>De Valvulis</i>, 1585, from the Wellcome Collection. It shows the outside and inside of part of a leg vein, AB, with a muscle tributary vein; C, D, and E are the two cusps of a bicuspid valve in the main vein. These are probably the first drawings of a venous valve<sup>[15]</sup>