cellular process | cell recognition | sperm-egg recognition | reproduction | reproductive process | binding of sperm to zona pellucida | cell-cell recognition | fertilization | single fertilization | sexual reproduction
secretory granule | intracellular membrane-bounded organelle | organelle membrane | cytoplasmic vesicle | cell | cytoplasm | acrosomal vesicle | intracellular organelle | secretory granule membrane | secretory vesicle | endomembrane system | vesicle | acrosomal membrane | extracellular region | membrane-bounded organelle | nucleus | organelle | vesicle membrane | intracellular vesicle | intracellular | membrane | cytoplasmic vesicle membrane