Milk is a mixture of fat, protein, carbohydrate and water. When raw milk sits, the fat separates from the rest of the liquid, rises to the top and forms a layer of cream. The purpose of homogenization is to keep the fat molecules dispersed throughout the milk, so separation does not occur and the milk remains uniform.
In the literature, reported cases of Zone II rupture include the one as described by Naohito et al. [4], of a man falling down stairs resulting in rupture of FDS and FDP. Other cases include one case in the series presented by Naam et al. [2], and 2 cases in the series presented by Imbriglia et al.
flexor tendon system or distal to the FDS insertion (Figure 2). Zone II, the âcritical zone,â where the FDS and FDP tendons run together in the flexor sheet, extends from the first annular pulley (Figure 3) to the insertion of the FDS tendon. Closed ruptures in zone II are extremely rare and have been described infre-quently in the literature.