[The dynamics of the secretion of linoleic acid as a component of the lipid classes with milk and their metabolism in the body of cows].

The paper is devoted to the questions of metabolism of the lipid classes and essential fatty acids in the ruminant organism and secretion of those acids with milk. The lipid classes, such as triacylglyceroles, phospholipides and cholesterol ethers, containing linoleic acid and others acids of that family, their function, structure, quantity and transport in the organism are characterized. The physiological lactation standards (duration, breed, season and diurnal variations) are described more exactly. The author's own and literature data concerning secretion of lipid classes, containing linoleic acid, on lactation periods (in the period of colostrum secretion and in all periods of milk secretion), lipid transport, transformation and metabolism in the digestive tract and the liver are discussed. The correlation of lipid classes and corresponding fatty acid composition in the forage, milk, colostrum and plasma of arterial and venous blood, obtained from ruminants, is characterized.