The kola nut is obtained from several West African trees, such as Cola nitida or C. vera, and C. acuminata, of the Sterculiaceae[?] family. It has a high caffeine content, and is used to make colasoft drinks.
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... function in both sexes, to pass urine to the outside, and also a reproductive function in the male, as a passage for sperm.
The external urethral sphincter is ...