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Mature female reproductive cell produced by the ovary, which, after fertilization by a spermatozoon, enables the embryo to develop.
Organelle containing a cell’s genes and controlling its activities.
Fine granular coat composed of mucopolysaccharides covering the egg; it allows a single spermatozoon to penetrate the egg, which then becomes impermeable to others.
Clear gelatinous substance surrounding the various cellular structures.
Small spherical body located inside the nucleus, within which the ribosomes, or protein-synthesizing structures, are produced.
Collection of granular cells that forms a protective crown around the egg.