Sperm Cell vs Egg Cell

• Size: The sperms cell are very small compared to the ovum.
• Energy Reserves: Before ejaculation the sperm is provided with fat, and after ejaculation the sperm use the fructose provide by the fluid secreted by the seminal vesicles, thus, the sperm cell can live for three to five days. In another hand, the egg can only live for one day if not fertilized. If fertilized, it will be implant in the endometrium, which will provide enough energy.
• numbers produced: Sperm are continuously produced, while eggs are not as much.
• Motility: The sperm are motile, however the eggs cannot move by themselves.
• Outer structures: The sperm head has a cap called acrosome, that contains enzymes that will help the sperm to enter the egg. The egg has a outer coating, which in most cases can only be penetrated by the sperm of the same specie.