Synergids are two specialized cells adjacent to the egg cell in the female gametophyte of flowering plants. They have an incomplete cell wall that is thicker at the micropylar end, containing a structure called the filiform apparatus. The filiform apparatus is made up of finger-like projections that increase the surface area for transport of substances into and out of the synergid to facilitate pollen tube guidance and nutrient exchange. One synergid degenerates after receiving the pollen tube discharge to provide a site for fertilization, while the other persists for a time to aid in nutrient transport within the embryo sac.