Figure 2From: Smoking and reproduction: The oviduct as a target of cigarette smokeSchematic diagram of an oocyte cumulus complex after ovulation from an ovarian follicle. The oocyte and polar body are contained within the zona pellucida. Immediately outside the zona, cells are densely packed to form the corona radiata outside of which are numerous cumulus cells. The cumulus cells are widely separated from each other by spaces filled with an extracellular matrix (matrix is shown in Figure 5).Back to article page