Difference between egg cells and sperm cells. It is very small in size compared to egg cells. It is also considered as the smallest cell in the body. Related to sperm quality is sperm size, at least in some animals. For instance, the sperm of some species of fruit fly are up to 5. About 20 times as long as the fly itself. Longer sperm cells are better than their shorter counterparts at displacing competitors from the female. S seminal receptacle. Sperm vs egg the human reproduction system produces egg. Difference between sperm and egg. Egg is bigger in size compared with sperm. In male humans, sperm cells consists of a head 5 µm by 3 µm and a tail 50 µm long. One millionth of a meter. If you average the ovum at. Μm and the male sperm in length at 55 µm the ratio is a three foot sperm would have an egg that is 8. Egg size is a critical life. History trait because it can profoundly influence offspring fitness and the number of offspring that can be produced. An illustration of a sperm cell penetrating an egg. Jezper, shutterstock most fertility research has focused on the size of sperm and the size of. At egg cell maturation the focus is on one cell, that expands in volume. Sperm cells show concentration of material and expansion of the number. Egg cells move from the inside to the outside, sperm cells from the outside to the inside. In appearance and processes egg cell and sperm are mutually antagonistic, each others opposite. Sperm is the male reproductive cell and is derived from the greek word sperma meaning the types of sexual reproduction known.