Explain the differences in sperm and egg structure.

The ovum has:
-more sizes
-round shape
– the presence of a large amount of yolk (nutrients of the future embryo)
-the presence of egg shells

Sperm cells have:
– small sizes
-various forms in different mammals
-organ of movement (flagella from 1 to several)
– a large number of mitochondria
– the absence of ribosomes and EPS, a modified Golgi apparatus.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.