structure and ingredients of Nigella Sativa advantages and medicinal uses protective function against diseases antidiabetic effect anticancerous effect structure of parotid salivary gland in young and old albino rats the role of Nigella Sativa as antiaging herb the role of nigella sativa on improving the activity of the parotid salivary gland for insulin and glucagon-like peptides recommendation for study of herbs to clarify their medicinal uses