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In humans, male sex cells or spermatozoa (sperm cells), are relatively motile.
Female sex cells, called ova or eggs, are non-motile and much larger in comparison to the male gamete.
The zona pellucida is a membrane covering that surrounds the cell membrane of the ovum.
It binds sperm cells and aids in the fertilization of the cell.
The production of sperm cells is known as spermatogenesis.The nucleus is located within the head region of the sperm cell.The DNA within the nucleus is densely packed, and the cell does not contain much cytoplasm.Female ova are some of the largest cells in the body and are round in shape.They are produced in the female ovaries and consist of a nucleus, large cytoplasmic region, the zona pellucida, and the corona radiata.